🛡️ CVE-2023-53848 — kernel

⚪ Unknown ✅ No Known Exploit NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

md/raid5-cache: fix a deadlock in r5l_exit_log()

In the Linux kernel, the following vulnerability has been resolved:

md/raid5-cache: fix a deadlock in r5l_exit_log()

Commit b13015af94cf ("md/raid5-cache: Clear conf->log after finishing

work") introduce a new problem:

// caller hold reconfig_mutex

r5l_exit_log

flush_work(&log->disable_writeback_work)

r5c_disable_writeback_async

wait_event

/*

  • conf->log is not NULL, and mddev_trylock()
  • will fail, wait_event() can never pass.

*/

conf->log = NULL

Fix this problem by setting 'config->log' to NULL before wake_up() as it

used to be, so that wait_event() from r5c_disable_writeback_async() can

exist. In the meantime, move forward md_unregister_thread() so that

null-ptr-deref this commit fixed can still be fixed.

Affected software

CVE-2023-53848 is recorded against 2 packages.

  • kernel (from 6.5.0 up to 6.5.3)
  • unknown

Timeline and source

Published on 9 December 2025 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2023-53848 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-12-09
Updated 2026-08-12
Modified 2026-07-15
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel 6.5.0 6.5.3
unknown — —

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