CVE-2026-72438 Affecting linux-6.12 package, versions <6.12.111-1~deb12u1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.46% (38th percentile)

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  • Snyk IDSNYK-DEBIAN12-LINUX612-20506764
  • published5 Oct 2026
  • disclosed15 Aug 2026

Introduced: 15 Aug 2026

CVE-2026-72438  (opens in a new tab)

How to fix?

Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

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

md/raid10: fix writes_pending and barrier reference leaks on discard failures

raid10_make_request() acquires a writes_pending reference with md_write_start() before calling raid10_handle_discard(). Several failure paths in raid10_handle_discard() complete the bio and return without releasing the corresponding reference, causing md_write_end() to be skipped.

Call md_write_end() before returning from these failure paths to keep writes_pending accounting balanced.

Additionally, discard split allocation failures can occur after wait_barrier() succeeds. Those paths return without calling allow_barrier(), leaking the associated barrier reference.

Release the barrier before returning from those paths.

CVSS Base Scores

version 3.1