CVE-2023-53832 Affecting ocfs2-kmp-default package, versions <5.14.21-150400.24.194.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-SLES154-OCFS2KMPDEFAULT-15347262
  • published25 Feb 2026
  • disclosed24 Feb 2026

Introduced: 24 Feb 2026

NewCVE-2023-53832  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 ocfs2-kmp-default to version 5.14.21-150400.24.194.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ocfs2-kmp-default package and not the ocfs2-kmp-default package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

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

md/raid10: fix null-ptr-deref in raid10_sync_request

init_resync() inits mempool and sets conf->have_replacemnt at the beginning of sync, close_sync() frees the mempool when sync is completed.

After [1] recovery might be skipped and init_resync() is called but close_sync() is not. null-ptr-deref occurs with r10bio->dev[i].repl_bio.

The following is one way to reproduce the issue.

  1. create a array, wait for resync to complete, mddev->recovery_cp is set to MaxSector.
  2. recovery is woken and it is skipped. conf->have_replacement is set to 0 in init_resync(). close_sync() not called.
  3. some io errors and rdev A is set to WantReplacement.
  4. a new device is added and set to A's replacement.
  5. recovery is woken, A have replacement, but conf->have_replacemnt is
    1. r10bio->dev[i].repl_bio will not be alloced and null-ptr-deref occurs.

Fix it by not calling init_resync() if recovery skipped.

[1] commit 7e83ccbecd60 ("md/raid10: Allow skipping recovery when clean arrays are assembled")

CVSS Base Scores

version 3.1