NULL Pointer Dereference Affecting ocfs2-kmp-default package, versions <6.4.0-150700.53.73.2


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.12% (3rd percentile)

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  • Snyk IDSNYK-SLES157-OCFS2KMPDEFAULT-18201978
  • published22 Jul 2026
  • disclosed21 Jul 2026

Introduced: 21 Jul 2026

NewCVE-2026-31749  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 ocfs2-kmp-default to version 6.4.0-150700.53.73.2 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:15.7 relevant fixed versions and status.

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

comedi: ni_atmio16d: Fix invalid clean-up after failed attach

If the driver's COMEDI "attach" handler function (atmio16d_attach()) returns an error, the COMEDI core will call the driver's "detach" handler function (atmio16d_detach()) to clean up. This calls reset_atmio16d() unconditionally, but depending on where the error occurred in the attach handler, the device may not have been sufficiently initialized to call reset_atmio16d(). It uses dev-&gt;iobase as the I/O port base address and dev-&gt;private as the pointer to the COMEDI device's private data structure. dev-&gt;iobase may still be set to its initial value of 0, which would result in undesired writes to low I/O port addresses. dev-&gt;private may still be NULL, which would result in null pointer dereferences.

Fix atmio16d_detach() by checking that dev-&gt;private is valid (non-null) before calling reset_atmio16d(). This implies that dev-&gt;iobase was set correctly since that is set up before dev-&gt;private.

CVSS Base Scores

version 3.1