CVE-2023-52699

Medium

In the Linux kernel, the following vulnerability has been resolved: sysv: don't call sb_bread() with pointers_lock held syzbot is reporting sleep in atomic context in SysV filesystem [1], for sb_bread() is called with rw_spinlock held. A "write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock" bug and a "sb_bread() with write_lock(&pointers_lock)" bug were introduced by "Replace BKL for chain locking with sysvfs-private rwlock" in Linux 2.5.12. Then, "[PATCH] err1-40: sysvfs locking fix" in Linux 2.6.8 fixed the former bug by moving pointers_lock lock to the callers, but instead introduced a "sb_bread() with read_lock(&pointers_lock)" bug (which made this problem easier to hit). Al Viro suggested that why not to do like get_branch()/get_block()/ find_shared() in Minix filesystem does. And doing like that is almost a revert of "[PATCH] err1-40: sysvfs locking fix" except that get_branch() from with find_shared() is called without write_lock(&pointers_lock).

Package Linux Kernel
Published 2024-05-19
Last modified 2025-04-04
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.3

out of 10
Medium
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness type

CWE-667

CVE-2023-52699 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.12 and later are affected. Fixed in 4.19.312, 5.4.274, 5.10.215, 5.15.155, 6.1.86, 6.6.27, 6.8.6, 6.9 and their respective stable series.

Affected from
≥ 2.6.12
Fixed in
✓ 4.19.312 4.19.x ✓ 5.4.274 5.4.x ✓ 5.10.215 5.10.x ✓ 5.15.155 5.15.x ✓ 6.1.86 6.1.x ✓ 6.6.27 6.6.x ✓ 6.8.6 6.8.x ✓ 6.9

References

10 total
Showing 5 of 10 references View all on NVD

Frequently asked questions

  • What is CVE-2023-52699?

    CVE-2023-52699 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.3 out of 10 , classified as an Improper Locking flaw (CWE-667) . It affects Linux kernel versions from 2.6.12 onward and has been patched in 4.19.312, 5.4.274, 5.10.215 and others. CVE-2023-52699 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2023-52699?

    CVE-2023-52699 has a CVSS score of 5.3 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L .

  • Is there a patch available for CVE-2023-52699?

    Yes. CVE-2023-52699 has been patched. Fixed versions include 4.19.312, 5.4.274, 5.10.215 and others. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2023-52699 actively exploited?

    No. CVE-2023-52699 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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