CVE-2023-1192
published 2023-11-01CVE-2023-1192: A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are…
PriorityP433medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
1.10%
65.2th percentile
A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.64-1 (bookworm) | linux 6.1.64-1 (bookworm) |
| linux | linux_kernel | < 6.4 | 6.4 |
| linux | linux_kernel | >= 0 < 6.1.64-1 | 6.1.64-1 |
| linux | linux_kernel | >= 0 < 6.5.6-1 | 6.5.6-1 |
| linux | linux_kernel | >= 0 < 6.5.6-1 | 6.5.6-1 |
| msrc | cbl2_kernel_5.15.137.1-1_on_cbl_mariner_2.0 | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv6.5MEDIUM
vendor_redhat7.8HIGH
vendor_debian6.5MEDIUM
vendor_msrc6.5MEDIUM
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Red Hat
kernel: cifs: use-after-free in cifs_demultiplex_thread()
vendor_redhat·2024-03-02·CVSS 7.8
CVE-2023-52572 [HIGH] kernel: cifs: use-after-free in cifs_demultiplex_thread()
kernel: cifs: use-after-free in cifs_demultiplex_thread()
In the Linux kernel, the following vulnerability has been resolved:
cifs: Fix UAF in cifs_demultiplex_thread()
There is a UAF when xfstests on cifs:
BUG: KASAN: use-after-free in smb2_is_network_name_deleted+0x27/0x160
Read of size 4 at addr ffff88810103fc08 by task cifsd/923
CPU: 1 PID: 923 Comm: cifsd Not tainted 6.1.0-rc4+ #45
...
Call Trace:
dump_stack_lvl+0x34/0x44
print_report+0x171/0x472
kasan_report+0xad/0x130
kasan_check_range+0x145/0x1a0
smb2_is_network_name_deleted+0x27/0x160
cifs_demultiplex_thread.cold+0x172/0x5a4
kthread+0x165/0x1a0
ret_from_fork+0x1f/0x30
Allocated by task 923:
kasan_save_stack+0x1e/0x40
kasan_set_track+0x21/0x30
__kasan_slab_alloc+0x54/0x60
kmem_cache_alloc+0x147/0x320
mempool_alloc+0xe1/0x260
cif
Microsoft
Use-after-free in smb2_is_status_io_timeout()
vendor_msrc·2023-11-14·CVSS 6.5
CVE-2023-1192 [MEDIUM] CWE-416 Use-after-free in smb2_is_status_io_timeout()
Use-after-free in smb2_is_status_io_timeout()
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
redhat: redhat
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microso
Debian
CVE-2023-1192: linux - A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Li...
vendor_debian·2023·CVSS 6.5
CVE-2023-1192 [MEDIUM] CVE-2023-1192: linux - A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Li...
A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.
Scope: local
bookworm: resolved (fixed in 6.1.64-1)
bullseye: open
forky: resolved (fixed in 6.5.6-1)
sid: resolved (fixed in 6.5.6-1)
trixie: resolved (fixed in 6.5.6-1)
Red Hat
kernel: use-after-free in smb2_is_status_io_timeout()
vendor_redhat·2022-10-02·CVSS 6.5
CVE-2023-1192 [MEDIUM] CWE-416 kernel: use-after-free in smb2_is_status_io_timeout()
kernel: use-after-free in smb2_is_status_io_timeout()
A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.
A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.
Statement: Because analysis indicates that this issue will only cause momen
OSV
CVE-2023-1192: A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel
osv·2023-11-01·CVSS 6.5
CVE-2023-1192 [MEDIUM] CVE-2023-1192: A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel
A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.
GHSA
GHSA-r277-j8m2-3x97: A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel
ghsa_unreviewed·2023-11-01
CVE-2023-1192 [MEDIUM] CWE-416 GHSA-r277-j8m2-3x97: A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel
A use-after-free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel. After CIFS transfers response data to a system call, there are still local variable points to the memory region, and if the system call frees it faster than CIFS uses it, CIFS will access a free memory region, leading to a denial of service.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2023-52572 kernel: cifs: use-after-free in cifs_demultiplex_thread()
bugzilla·2024-03-04·CVSS 6.5
CVE-2023-52572 [MEDIUM] CVE-2023-52572 kernel: cifs: use-after-free in cifs_demultiplex_thread()
CVE-2023-52572 kernel: cifs: use-after-free in cifs_demultiplex_thread()
In the Linux kernel, the following vulnerability has been resolved:
cifs: Fix UAF in cifs_demultiplex_thread()
The Linux kernel CVE team has assigned CVE-2023-52572 to this issue.
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024030256-CVE-2023-52572-2b92@gregkh/T/#u
Discussion:
*** This bug has been marked as a duplicate of bug 2154178 ***
---
CVE-2023-52572 is a duplicate of CVE-2023-1192
Bugzilla
CVE-2023-1192 kernel: use-after-free in smb2_is_status_io_timeout()
bugzilla·2022-12-16·CVSS 6.5
CVE-2023-1192 [MEDIUM] CVE-2023-1192 kernel: use-after-free in smb2_is_status_io_timeout()
CVE-2023-1192 kernel: use-after-free in smb2_is_status_io_timeout()
A use after free flaw was found in smb2_is_status_io_timeout() in CIFS in the Linux Kernel.
When client uses CIFS, system calls about file operation will call cifs API to send samba request, and there is a CIFS kernel thread handler `cifs_demultiplex_thread()` which receives response from remote server and transfer those data to corresponding syscall request.
After CIFS transfers response data to system call, there is still a local variable points to the memory region, and if system call frees it faster than CIFS uses it, CIFS will access a free memory region when calls function such as `smb2_is_status_io_timeout()` .
Refer:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d527f51331cace562
https://access.redhat.com/security/cve/CVE-2023-1192https://bugzilla.redhat.com/show_bug.cgi?id=2154178https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d527f51331cace562393a8038d870b3e9916686fhttps://access.redhat.com/security/cve/CVE-2023-1192https://bugzilla.redhat.com/show_bug.cgi?id=2154178https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d527f51331cace562393a8038d870b3e9916686f
2023-11-01
Published