CVE-2024-39463
published 2024-06-25CVE-2024-39463: In the Linux kernel, the following vulnerability has been resolved: 9p: add missing locking around taking dentry fid list Fix a use-after-free on dentry's…
PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.25%
16.8th percentile
In the Linux kernel, the following vulnerability has been resolved:
9p: add missing locking around taking dentry fid list
Fix a use-after-free on dentry's d_fsdata fid list when a thread
looks up a fid through dentry while another thread unlinks it:
UAF thread:
refcount_t: addition on 0; use-after-free.
p9_fid_get linux/./include/net/9p/client.h:262
v9fs_fid_find+0x236/0x280 linux/fs/9p/fid.c:129
v9fs_fid_lookup_with_uid linux/fs/9p/fid.c:181
v9fs_fid_lookup+0xbf/0xc20 linux/fs/9p/fid.c:314
v9fs_vfs_getattr_dotl+0xf9/0x360 linux/fs/9p/vfs_inode_dotl.c:400
vfs_statx+0xdd/0x4d0 linux/fs/stat.c:248
Freed by:
p9_fid_destroy (inlined)
p9_client_clunk+0xb0/0xe0 linux/net/9p/client.c:1456
p9_fid_put linux/./include/net/9p/client.h:278
v9fs_dentry_release+0xb5/0x140 linux/fs/9p/vfs_dentry.c:55
v9fs_remove+0x38f/0x620 linux/fs/9p/vfs_inode.c:518
vfs_unlink+0x29a/0x810 linux/fs/namei.c:4335
The problem is that d_fsdata was not accessed under d_lock, because
d_release() normally is only called once the dentry is otherwise no
longer accessible but since we also call it explicitly in v9fs_remove
that lock is required:
move the hlist out of the dentry under lock then unref its fids once
they are no longer accessible.
Affected
19 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.94-1 (bookworm) | linux 6.1.94-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 154372e67d4053e56591245eb413686621941333 < 3bb6763a8319170c2d41c4232c8e7e4c37dcacfb | 3bb6763a8319170c2d41c4232c8e7e4c37dcacfb |
| linux | linux | >= 154372e67d4053e56591245eb413686621941333 < cb299cdba09f46f090b843d78ba26b667d50a456 | cb299cdba09f46f090b843d78ba26b667d50a456 |
| linux | linux | >= 154372e67d4053e56591245eb413686621941333 < f0c5c944c6d8614c19e6e9a97fd2011dcd30e8f5 | f0c5c944c6d8614c19e6e9a97fd2011dcd30e8f5 |
| linux | linux | >= 154372e67d4053e56591245eb413686621941333 < fe17ebf22feb4ad7094d597526d558a49aac92b4 | fe17ebf22feb4ad7094d597526d558a49aac92b4 |
| linux | linux | >= 154372e67d4053e56591245eb413686621941333 < c898afdc15645efb555acb6d85b484eb40a45409 | c898afdc15645efb555acb6d85b484eb40a45409 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.1.94-1 | 6.1.94-1 |
| linux | linux_kernel | >= 0 < 6.9.7-1 | 6.9.7-1 |
| linux | linux_kernel | >= 0 < 6.9.7-1 | 6.9.7-1 |
| linux | linux_kernel | >= 0 < 5.15.0-127.137 | 5.15.0-127.137 |
| linux | linux_kernel | >= 0 < 6.8.0-44.44 | 6.8.0-44.44 |
| linux | linux_kernel | >= 5.11 < 5.15.168 | 5.15.168 |
| linux | linux_kernel | >= 5.16 < 6.1.94 | 6.1.94 |
| linux | linux_kernel | >= 6.2 < 6.6.34 | 6.6.34 |
| linux | linux_kernel | >= 6.7 < 6.9.5 | 6.9.5 |
| msrc | cbl2_kernel_5.15.176.3-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_kernel_5.15.182.1-1_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian7.8HIGH
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
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kernel did not properly initialize memory in some situations. A physically
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Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
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It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
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code. (CVE-2024-23848)
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vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
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code. (CVE-2024-23848)
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vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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- MIPS architecture;
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Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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- MIPS architecture;
- PA-RI
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contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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Red Hat
kernel: 9p: add missing locking around taking dentry fid list
vendor_redhat·2024-06-25·CVSS 7.8
CVE-2024-39463 [HIGH] CWE-416 kernel: 9p: add missing locking around taking dentry fid list
kernel: 9p: add missing locking around taking dentry fid list
In the Linux kernel, the following vulnerability has been resolved:
9p: add missing locking around taking dentry fid list
Fix a use-after-free on dentry's d_fsdata fid list when a thread
looks up a fid through dentry while another thread unlinks it:
UAF thread:
refcount_t: addition on 0; use-after-free.
p9_fid_get linux/./include/net/9p/client.h:262
v9fs_fid_find+0x236/0x280 linux/fs/9p/fid.c:129
v9fs_fid_lookup_with_uid linux/fs/9p/fid.c:181
v9fs_fid_lookup+0xbf/0xc20 linux/fs/9p/fid.c:314
v9fs_vfs_getattr_dotl+0xf9/0x360 linux/fs/9p/vfs_inode_dotl.c:400
vfs_statx+0xdd/0x4d0 linux/fs/stat.c:248
Freed by:
p9_fid_destroy (inlined)
p9_client_clunk+0xb0/0xe0 linux/net/9p/client.c:1456
p9_fid_put linux/./include/net/9p/client.h:278
Microsoft
9p: add missing locking around taking dentry fid list
vendor_msrc·2024-06-11·CVSS 7.8
CVE-2024-39463 [HIGH] CWE-416 9p: add missing locking around taking dentry fid list
9p: add missing locking around taking dentry fid list
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.m
Debian
CVE-2024-39463: linux - In the Linux kernel, the following vulnerability has been resolved: 9p: add mis...
vendor_debian·2024·CVSS 7.8
CVE-2024-39463 [HIGH] CVE-2024-39463: linux - In the Linux kernel, the following vulnerability has been resolved: 9p: add mis...
In the Linux kernel, the following vulnerability has been resolved: 9p: add missing locking around taking dentry fid list Fix a use-after-free on dentry's d_fsdata fid list when a thread looks up a fid through dentry while another thread unlinks it: UAF thread: refcount_t: addition on 0; use-after-free. p9_fid_get linux/./include/net/9p/client.h:262 v9fs_fid_find+0x236/0x280 linux/fs/9p/fid.c:129 v9fs_fid_lookup_with_uid linux/fs/9p/fid.c:181 v9fs_fid_lookup+0xbf/0xc20 linux/fs/9p/fid.c:314 v9fs_vfs_getattr_dotl+0xf9/0x360 linux/fs/9p/vfs_inode_dotl.c:400 vfs_statx+0xdd/0x4d0 linux/fs/stat.c:248 Freed by: p9_fid_destroy (inlined) p9_client_clunk+0xb0/0xe0 linux/net/9p/client.c:1456 p9_fid_put linux/./include/net/9p/client.h:278 v9fs_dentry_release+0xb5/0x140 linux/fs/9p/vfs_dentry.c:55 v9f
OSV
linux-xilinx-zynqmp vulnerabilities
osv·2025-01-20
linux-xilinx-zynqmp vulnerabilities
linux-xilinx-zynqmp vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Block layer subsystem;
- ACPI drivers;
- Drivers core;
- ATA over ethernet (AOE) driver;
- TPM device driver;
- Clock framework and drivers;
- Buffer Sharing and Synchronization framework;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- InfiniBand drivers;
- Input Device core drivers;
- Mailbox framework;
- Media drivers;
- Ethernet bonding driver;
- Network drivers;
- Mellanox network drivers;
- Microsoft Azure Network Adapter (MANA) driver;
- STMicroelectr
OSV
linux-azure, linux-intel-iotg-5.15 vulnerabilities
osv·2025-01-09·CVSS 8.8
CVE-2020-12351 [HIGH] linux-azure, linux-intel-iotg-5.15 vulnerabilities
linux-azure, linux-intel-iotg-5.15 vulnerabilities
Andy Nguyen discovered that the Bluetooth L2CAP implementation in the Linux
kernel contained a type-confusion error. A physically proximate remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2020-12351)
Andy Nguyen discovered that the Bluetooth A2MP implementation in the Linux
kernel did not properly initialize memory in some situations. A physically
proximate remote attacker could use this to expose sensitive information
(kernel memory). (CVE-2020-12352)
Andy Nguyen discovered that the Bluetooth HCI event packet parser in the
Linux kernel did not properly handle event advertisements of certain sizes,
leading to a heap-based buffer overflow. A physically proximate remote
a
OSV
linux-azure-5.15 vulnerabilities
osv·2025-01-09·CVSS 8.8
CVE-2020-12351 [HIGH] linux-azure-5.15 vulnerabilities
linux-azure-5.15 vulnerabilities
Andy Nguyen discovered that the Bluetooth L2CAP implementation in the Linux
kernel contained a type-confusion error. A physically proximate remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2020-12351)
Andy Nguyen discovered that the Bluetooth A2MP implementation in the Linux
kernel did not properly initialize memory in some situations. A physically
proximate remote attacker could use this to expose sensitive information
(kernel memory). (CVE-2020-12352)
Andy Nguyen discovered that the Bluetooth HCI event packet parser in the
Linux kernel did not properly handle event advertisements of certain sizes,
leading to a heap-based buffer overflow. A physically proximate remote
attacker could use
OSV
linux-intel-iotg vulnerabilities
osv·2025-01-06·CVSS 8.8
CVE-2020-12351 [HIGH] linux-intel-iotg vulnerabilities
linux-intel-iotg vulnerabilities
Andy Nguyen discovered that the Bluetooth L2CAP implementation in the Linux
kernel contained a type-confusion error. A physically proximate remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2020-12351)
Andy Nguyen discovered that the Bluetooth A2MP implementation in the Linux
kernel did not properly initialize memory in some situations. A physically
proximate remote attacker could use this to expose sensitive information
(kernel memory). (CVE-2020-12352)
Andy Nguyen discovered that the Bluetooth HCI event packet parser in the
Linux kernel did not properly handle event advertisements of certain sizes,
leading to a heap-based buffer overflow. A physically proximate remote
attacker could use
OSV
linux-hwe-5.15 vulnerabilities
osv·2024-12-20
linux-hwe-5.15 vulnerabilities
linux-hwe-5.15 vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Block layer subsystem;
- ACPI drivers;
- Drivers core;
- ATA over ethernet (AOE) driver;
- TPM device driver;
- Clock framework and drivers;
- Buffer Sharing and Synchronization framework;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- InfiniBand drivers;
- Input Device core drivers;
- Mailbox framework;
- Media drivers;
- Ethernet bonding driver;
- Network drivers;
- Mellanox network drivers;
- Microsoft Azure Network Adapter (MANA) driver;
- STMicroelectronics
OSV
linux-aws, linux-aws-5.15 vulnerabilities
osv·2024-12-17
linux-aws, linux-aws-5.15 vulnerabilities
linux-aws, linux-aws-5.15 vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Block layer subsystem;
- ACPI drivers;
- Drivers core;
- ATA over ethernet (AOE) driver;
- TPM device driver;
- Clock framework and drivers;
- Buffer Sharing and Synchronization framework;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- InfiniBand drivers;
- Input Device core drivers;
- Mailbox framework;
- Media drivers;
- Ethernet bonding driver;
- Network drivers;
- Mellanox network drivers;
- Microsoft Azure Network Adapter (MANA) driver;
- STMicro
OSV
linux, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi
osv·2024-12-17
linux, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi
linux, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM32 architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Block layer subsystem;
- ACPI drivers;
- Drivers core;
- ATA over ethernet (AOE) driver;
- TPM device driver;
- Clock framework and drivers;
- Buffer Sharing and Synchronization framework;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- InfiniBand drivers;
- Input Device core drive
OSV
linux-hwe-6.8
osv·2024-09-23·CVSS 5.5
CVE-2024-23848 [MEDIUM] linux-hwe-6.8
linux-hwe-6.8
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- User-Mode Linux (UML);
OSV
linux-raspi vulnerabilities
osv·2024-09-23·CVSS 5.5
CVE-2024-23848 [MEDIUM] linux-raspi vulnerabilities
linux-raspi vulnerabilities
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- x86 arch
OSV
linux-lowlatency-hwe-6.8 vulnerabilities
osv·2024-09-13·CVSS 5.5
CVE-2024-23848 [MEDIUM] linux-lowlatency-hwe-6.8 vulnerabilities
linux-lowlatency-hwe-6.8 vulnerabilities
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architectur
OSV
linux-nvidia-6.8 vulnerabilities
osv·2024-09-13·CVSS 5.5
CVE-2024-23848 [MEDIUM] linux-nvidia-6.8 vulnerabilities
linux-nvidia-6.8 vulnerabilities
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- x86
OSV
linux-nvidia, linux-nvidia-lowlatency vulnerabilities
osv·2024-09-12·CVSS 5.5
CVE-2024-23848 [MEDIUM] linux-nvidia, linux-nvidia-lowlatency vulnerabilities
linux-nvidia, linux-nvidia-lowlatency vulnerabilities
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-
OSV
linux-azure vulnerabilities
osv·2024-09-12·CVSS 5.5
CVE-2024-23848 [MEDIUM] linux-azure vulnerabilities
linux-azure vulnerabilities
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architecture;
- PA-RISC architecture;
- PowerPC architecture;
- RISC-V architecture;
- x86 arch
OSV
linux, linux-aws, linux-gcp, linux-gke, linux-ibm, linux-lowlatency, linux-oem-6.8, linux-oracle vulnerabilities
osv·2024-09-11·CVSS 5.5
CVE-2024-23848 [MEDIUM] linux, linux-aws, linux-gcp, linux-gke, linux-ibm, linux-lowlatency, linux-oem-6.8, linux-oracle vulnerabilities
linux, linux-aws, linux-gcp, linux-gke, linux-ibm, linux-lowlatency, linux-oem-6.8, linux-oracle vulnerabilities
Chenyuan Yang discovered that the CEC driver driver in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2024-23848)
It was discovered that the JFS file system contained an out-of-bounds read
vulnerability when printing xattr debug information. A local attacker could
use this to cause a denial of service (system crash). (CVE-2024-40902)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- MIPS architectu
GHSA
GHSA-5v6g-vfrc-9w8p: In the Linux kernel, the following vulnerability has been resolved:
9p: add missing locking around taking dentry fid list
Fix a use-after-free on de
ghsa_unreviewed·2024-06-25
CVE-2024-39463 [HIGH] CWE-416 GHSA-5v6g-vfrc-9w8p: In the Linux kernel, the following vulnerability has been resolved:
9p: add missing locking around taking dentry fid list
Fix a use-after-free on de
In the Linux kernel, the following vulnerability has been resolved:
9p: add missing locking around taking dentry fid list
Fix a use-after-free on dentry's d_fsdata fid list when a thread
looks up a fid through dentry while another thread unlinks it:
UAF thread:
refcount_t: addition on 0; use-after-free.
p9_fid_get linux/./include/net/9p/client.h:262
v9fs_fid_find+0x236/0x280 linux/fs/9p/fid.c:129
v9fs_fid_lookup_with_uid linux/fs/9p/fid.c:181
v9fs_fid_lookup+0xbf/0xc20 linux/fs/9p/fid.c:314
v9fs_vfs_getattr_dotl+0xf9/0x360 linux/fs/9p/vfs_inode_dotl.c:400
vfs_statx+0xdd/0x4d0 linux/fs/stat.c:248
Freed by:
p9_fid_destroy (inlined)
p9_client_clunk+0xb0/0xe0 linux/net/9p/client.c:1456
p9_fid_put linux/./include/net/9p/client.h:278
v9fs_dentry_release+0xb5/0x140 linux/fs/9p/vfs_dentry.c:55
OSV
CVE-2024-39463: In the Linux kernel, the following vulnerability has been resolved: 9p: add missing locking around taking dentry fid list Fix a use-after-free on dent
osv·2024-06-25·CVSS 7.8
CVE-2024-39463 [HIGH] CVE-2024-39463: In the Linux kernel, the following vulnerability has been resolved: 9p: add missing locking around taking dentry fid list Fix a use-after-free on dent
In the Linux kernel, the following vulnerability has been resolved: 9p: add missing locking around taking dentry fid list Fix a use-after-free on dentry's d_fsdata fid list when a thread looks up a fid through dentry while another thread unlinks it: UAF thread: refcount_t: addition on 0; use-after-free. p9_fid_get linux/./include/net/9p/client.h:262 v9fs_fid_find+0x236/0x280 linux/fs/9p/fid.c:129 v9fs_fid_lookup_with_uid linux/fs/9p/fid.c:181 v9fs_fid_lookup+0xbf/0xc20 linux/fs/9p/fid.c:314 v9fs_vfs_getattr_dotl+0xf9/0x360 linux/fs/9p/vfs_inode_dotl.c:400 vfs_statx+0xdd/0x4d0 linux/fs/stat.c:248 Freed by: p9_fid_destroy (inlined) p9_client_clunk+0xb0/0xe0 linux/net/9p/client.c:1456 p9_fid_put linux/./include/net/9p/client.h:278 v9fs_dentry_release+0xb5/0x140 linux/fs/9p/vfs_dentry.c:55 v9f
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://git.kernel.org/stable/c/3bb6763a8319170c2d41c4232c8e7e4c37dcacfbhttps://git.kernel.org/stable/c/c898afdc15645efb555acb6d85b484eb40a45409https://git.kernel.org/stable/c/cb299cdba09f46f090b843d78ba26b667d50a456https://git.kernel.org/stable/c/f0c5c944c6d8614c19e6e9a97fd2011dcd30e8f5https://git.kernel.org/stable/c/fe17ebf22feb4ad7094d597526d558a49aac92b4https://www.zerodayinitiative.com/advisories/ZDI-24-1194/https://git.kernel.org/stable/c/c898afdc15645efb555acb6d85b484eb40a45409https://git.kernel.org/stable/c/cb299cdba09f46f090b843d78ba26b667d50a456https://git.kernel.org/stable/c/f0c5c944c6d8614c19e6e9a97fd2011dcd30e8f5https://git.kernel.org/stable/c/fe17ebf22feb4ad7094d597526d558a49aac92b4
2024-06-25
Published