CVE-2022-49995 Affecting reiserfs-kmp-default package, versions <5.14.21-150400.24.170.2


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-SLES154-REISERFSKMPDEFAULT-11176251
  • published29 Jul 2025
  • disclosed28 Jul 2025

Introduced: 28 Jul 2025

NewCVE-2022-49995  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 reiserfs-kmp-default to version 5.14.21-150400.24.170.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream reiserfs-kmp-default package and not the reiserfs-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:

writeback: avoid use-after-free after removing device

When a disk is removed, bdi_unregister gets called to stop further writeback and wait for associated delayed work to complete. However, wb_inode_writeback_end() may schedule bandwidth estimation dwork after this has completed, which can result in the timer attempting to access the just freed bdi_writeback.

Fix this by checking if the bdi_writeback is alive, similar to when scheduling writeback work.

Since this requires wb->work_lock, and wb_inode_writeback_end() may get called from interrupt, switch wb->work_lock to an irqsafe lock.

CVSS Base Scores

version 3.1