CVE-2025-21812
published 2025-02-27CVE-2025-21812: In the Linux kernel, the following vulnerability has been resolved: ax25: rcu protect dev->ax25_ptr syzbot found a lockdep issue [1]. We should remove ax25…
PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.22%
12.7th percentile
In the Linux kernel, the following vulnerability has been resolved:
ax25: rcu protect dev->ax25_ptr
syzbot found a lockdep issue [1].
We should remove ax25 RTNL dependency in ax25_setsockopt()
This should also fix a variety of possible UAF in ax25.
[1]
WARNING: possible circular locking dependency detected
6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted
syz.5.1818/12806 is trying to acquire lock:
ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680
but task is already holding lock:
ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]
ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (sk_lock-AF_AX25){+.+.}-{0:0}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
lock_sock_nested+0x48/0x100 net/core/sock.c:3642
lock_sock include/net/sock.h:1618 [inline]
ax25_kill_by_device net/ax25/af_ax25.c:101 [inline]
ax25_device_event+0x24d/0x580 net/ax25/af_ax25.c:146
notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
__dev_notify_flags+0x207/0x400
dev_change_flags+0xf0/0x1a0 net/core/dev.c:9026
dev_ifsioc+0x7c8/0xe70 net/core/dev_ioctl.c:563
dev_ioctl+0x719/0x1340 net/core/dev_ioctl.c:820
sock_do_ioctl+0x240/0x460 net/socket.c:1234
sock_ioctl+0x626/0x8e0 net/socket.c:1339
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (rtnl_mutex){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/lock
Affected
34 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.129-1 (bookworm) | linux 6.1.129-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.129-1 (bookworm) | linux 6.1.129-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 3.18.132 < 3.19 | 3.19 |
| linux | linux | >= 4.14.92 < 4.15 | 4.15 |
| linux | linux | >= 4.19.14 < 4.20 | 4.20 |
| linux | linux | >= 4.20.1 < 4.21 | 4.21 |
| linux | linux | >= 4.4.170 < 4.5 | 4.5 |
| linux | linux | >= 4.9.149 < 4.10 | 4.10 |
| linux | linux | >= c433570458e49bccea5c551df628d058b3526289 < 2802ed4ced27ebd474828fc67ffd7d66f11e3605 | 2802ed4ced27ebd474828fc67ffd7d66f11e3605 |
| linux | linux | >= c433570458e49bccea5c551df628d058b3526289 < 7705d8a7f2c26c80973c81093db07c6022b2b30e | 7705d8a7f2c26c80973c81093db07c6022b2b30e |
| linux | linux | >= c433570458e49bccea5c551df628d058b3526289 < 8937f5e38a218531dce2a89fae60e3adcc2311e1 | 8937f5e38a218531dce2a89fae60e3adcc2311e1 |
| linux | linux | >= c433570458e49bccea5c551df628d058b3526289 < c2531db6de3c95551be58878f859c6a053b7eb2e | c2531db6de3c95551be58878f859c6a053b7eb2e |
| linux | linux | >= c433570458e49bccea5c551df628d058b3526289 < 95fc45d1dea8e1253f8ec58abc5befb71553d666 | 95fc45d1dea8e1253f8ec58abc5befb71553d666 |
| linux | linux_kernel | >= 0 < 6.1.129-1 | 6.1.129-1 |
| linux | linux_kernel | >= 0 < 6.12.13-1 | 6.12.13-1 |
| linux | linux_kernel | >= 0 < 6.12.13-1 | 6.12.13-1 |
| linux | linux_kernel | >= 0 < 6.8.0-64.67 | 6.8.0-64.67 |
| linux | linux_kernel | >= 3.18.132 < 3.19 | 3.19 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.8HIGH
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- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
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- IOMMU subsystem;
- Media drivers;
- NVIDIA Tegra memory controller driver;
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- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
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- IOMMU subsystem;
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- Character device driver;
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- Clock framework and drivers;
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- GPU drivers;
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An attacker could possibly use these to compromise the system.
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- S390 architecture;
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- Drivers core;
- Network block device driver;
- Character device driver;
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- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
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- Character device driver;
- TPM device driver;
- Clock framework and drivers;
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- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
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- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
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- TPM device driver;
- Clock framework and drivers;
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers
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CVE-2025-21812: In the Linux kernel, the following vulnerability has been resolved: ax25: rcu protect dev->ax25_ptr syzbot found a lockdep issue [1]
osv·2025-02-27·CVSS 7.8
CVE-2025-21812 [HIGH] CVE-2025-21812: In the Linux kernel, the following vulnerability has been resolved: ax25: rcu protect dev->ax25_ptr syzbot found a lockdep issue [1]
In the Linux kernel, the following vulnerability has been resolved: ax25: rcu protect dev->ax25_ptr syzbot found a lockdep issue [1]. We should remove ax25 RTNL dependency in ax25_setsockopt() This should also fix a variety of possible UAF in ax25. [1] WARNING: possible circular locking dependency detected 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted ------------------------------------------------------ syz.5.1818/12806 is trying to acquire lock: ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680 but task is already holding lock: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline] ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574 which l
GHSA
GHSA-5qmp-w6rv-24wf: In the Linux kernel, the following vulnerability has been resolved:
ax25: rcu protect dev->ax25_ptr
syzbot found a lockdep issue [1]
ghsa_unreviewed·2025-02-27
CVE-2025-21812 [HIGH] CWE-416 GHSA-5qmp-w6rv-24wf: In the Linux kernel, the following vulnerability has been resolved:
ax25: rcu protect dev->ax25_ptr
syzbot found a lockdep issue [1]
In the Linux kernel, the following vulnerability has been resolved:
ax25: rcu protect dev->ax25_ptr
syzbot found a lockdep issue [1].
We should remove ax25 RTNL dependency in ax25_setsockopt()
This should also fix a variety of possible UAF in ax25.
[1]
WARNING: possible circular locking dependency detected
6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted
syz.5.1818/12806 is trying to acquire lock:
ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680
but task is already holding lock:
ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]
ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574
which lock already depends on the new lock.
the exist
Ubuntu
Linux kernel (Azure) vulnerabilities
vendor_ubuntu·2025-09-03
CVE-2025-21741 Linux kernel (Azure) vulnerabilities
Title: Linux kernel (Azure) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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;
- PowerPC architecture;
- S390 architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
- IOMMU subsystem;
- Multiple devices driver;
- Media drivers;
- NVIDIA Tegra memory cont
Ubuntu
Linux kernel (Raspberry Pi Real-time) vulnerabilities
vendor_ubuntu·2025-07-24·CVSS 5.5
CVE-2025-21801 [MEDIUM] Linux kernel (Raspberry Pi Real-time) vulnerabilities
Title: Linux kernel (Raspberry Pi Real-time) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- PowerPC architecture;
- S390 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- IOMMU subsystem;
- Media drivers;
- NVIDIA Tegra memory controller driver;
- Fastrpc Driver;
- Network drivers;
- Operating Performance Points (OPP) driver;
- PCI
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities
vendor_ubuntu·2025-07-24·CVSS 7.8
CVE-2025-21830 [HIGH] Linux kernel (Raspberry Pi) vulnerabilities
Title: Linux kernel (Raspberry Pi) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- PowerPC architecture;
- S390 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- IOMMU subsystem;
- Media drivers;
- NVIDIA Tegra memory controller driver;
- Fastrpc Driver;
- Network drivers;
- Operating Performance Points (OPP) driver;
- PCI subsystem
Ubuntu
Linux kernel (GCP) vulnerabilities
vendor_ubuntu·2025-07-22·CVSS 5.5
CVE-2025-21804 [MEDIUM] Linux kernel (GCP) vulnerabilities
Title: Linux kernel (GCP) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- PowerPC architecture;
- S390 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- IOMMU subsystem;
- Media drivers;
- NVIDIA Tegra memory controller driver;
- Fastrpc Driver;
- Network drivers;
- Operating Performance Points (OPP) driver;
- PCI subsystem;
- x86 p
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-07-22·CVSS 7.8
CVE-2025-21804 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- PowerPC architecture;
- S390 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- IOMMU subsystem;
- Media drivers;
- NVIDIA Tegra memory controller driver;
- Fastrpc Driver;
- Network drivers;
- Operating Performance Points (OPP) driver;
- PCI subsystem;
- x86 platfor
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-07-18·CVSS 7.8
CVE-2024-58070 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- PowerPC architecture;
- S390 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- IOMMU subsystem;
- Media drivers;
- NVIDIA Tegra memory controller driver;
- Fastrpc Driver;
- Network drivers;
- Operating Performance Points (OPP) driver;
- PCI subsystem;
- x86 platfor
Ubuntu
Linux kernel (Real-time) vulnerabilities
vendor_ubuntu·2025-07-17·CVSS 7.8
CVE-2024-57953 [HIGH] Linux kernel (Real-time) vulnerabilities
Title: Linux kernel (Real-time) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- PowerPC architecture;
- S390 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- IOMMU subsystem;
- Media drivers;
- NVIDIA Tegra memory controller driver;
- Fastrpc Driver;
- Network drivers;
- Operating Performance Points (OPP) driver;
- PCI subsystem;
-
Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2025-07-17·CVSS 5.9
CVE-2024-57953 [MEDIUM] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that the CIFS network file system implementation in the
Linux kernel did not properly verify the target namespace when handling
upcalls. An attacker could use this to expose sensitive information.
(CVE-2025-2312)
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:
- PowerPC architecture;
- S390 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPIO subsystem;
- GP
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-07-17·CVSS 7.8
CVE-2024-57953 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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:
- PowerPC architecture;
- S390 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- FireWire subsystem;
- GPU drivers;
- HID subsystem;
- I3C subsystem;
- InfiniBand drivers;
- IOMMU subsystem;
- Media drivers;
- NVIDIA Tegra memory controller driver;
- Fastrpc Driver;
- Network drivers;
- Operating Performance Points (OPP) driver;
- PCI subsystem;
- x86 platfor
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-05-28
CVE-2024-57977 Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
- IOM
Ubuntu
Linux kernel (AWS) vulnerabilities
vendor_ubuntu·2025-05-22
CVE-2025-21716 Linux kernel (AWS) vulnerabilities
Title: Linux kernel (AWS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-05-20
CVE-2025-21716 Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- Network block device driver;
- Bluetooth drivers;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Hardware crypto device drivers;
- FireWire subsystem;
- EFI core;
- Qualcomm firmware drivers;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- I2C subsystem;
- I3C subsystem;
- InfiniBand drivers;
- Input Device (Mouse) drivers;
- IOM
Red Hat
kernel: ax25: rcu protect dev->ax25_ptr
vendor_redhat·2025-02-27·CVSS 7.8
CVE-2025-21812 [HIGH] CWE-416 kernel: ax25: rcu protect dev->ax25_ptr
kernel: ax25: rcu protect dev->ax25_ptr
In the Linux kernel, the following vulnerability has been resolved:
ax25: rcu protect dev->ax25_ptr
syzbot found a lockdep issue [1].
We should remove ax25 RTNL dependency in ax25_setsockopt()
This should also fix a variety of possible UAF in ax25.
[1]
WARNING: possible circular locking dependency detected
6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted
syz.5.1818/12806 is trying to acquire lock:
ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680
but task is already holding lock:
ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline]
ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574
which lock already de
Microsoft
ax25: rcu protect dev->ax25_ptr
vendor_msrc·2025-02-11·CVSS 7.8
CVE-2025-21812 [HIGH] CWE-416 ax25: rcu protect dev->ax25_ptr
ax25: rcu protect dev->ax25_ptr
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
Debian
CVE-2025-21812: linux - In the Linux kernel, the following vulnerability has been resolved: ax25: rcu p...
vendor_debian·2025·CVSS 7.8
CVE-2025-21812 [HIGH] CVE-2025-21812: linux - In the Linux kernel, the following vulnerability has been resolved: ax25: rcu p...
In the Linux kernel, the following vulnerability has been resolved: ax25: rcu protect dev->ax25_ptr syzbot found a lockdep issue [1]. We should remove ax25 RTNL dependency in ax25_setsockopt() This should also fix a variety of possible UAF in ax25. [1] WARNING: possible circular locking dependency detected 6.13.0-rc3-syzkaller-00762-g9268abe611b0 #0 Not tainted ------------------------------------------------------ syz.5.1818/12806 is trying to acquire lock: ffffffff8fcb3988 (rtnl_mutex){+.+.}-{4:4}, at: ax25_setsockopt+0xa55/0xe90 net/ax25/af_ax25.c:680 but task is already holding lock: ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline] ffff8880617ac258 (sk_lock-AF_AX25){+.+.}-{0:0}, at: ax25_setsockopt+0x209/0xe90 net/ax25/af_ax25.c:574 which l
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/2802ed4ced27ebd474828fc67ffd7d66f11e3605https://git.kernel.org/stable/c/7705d8a7f2c26c80973c81093db07c6022b2b30ehttps://git.kernel.org/stable/c/8937f5e38a218531dce2a89fae60e3adcc2311e1https://git.kernel.org/stable/c/95fc45d1dea8e1253f8ec58abc5befb71553d666https://git.kernel.org/stable/c/c2531db6de3c95551be58878f859c6a053b7eb2ehttps://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
2025-02-27
Published