Double Free Affecting cluster-md-kmp-default package, versions <5.14.21-150500.55.100.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.02% (3rd percentile)

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  • Snyk IDSNYK-SLES155-CLUSTERMDKMPDEFAULT-9695973
  • published15 Apr 2025
  • disclosed14 Apr 2025

Introduced: 14 Apr 2025

NewCVE-2022-49203  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 cluster-md-kmp-default to version 5.14.21-150500.55.100.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cluster-md-kmp-default package and not the cluster-md-kmp-default package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

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

drm/amd/display: Fix double free during GPU reset on DC streams

[Why] The issue only occurs during the GPU reset code path.

We first backup the current state prior to commiting 0 streams internally from DM to DC. This state backup contains valid link encoder assignments.

DC will clear the link encoder assignments as part of current state (but not the backup, since it was a copied before the commit) and free the extra stream reference it held.

DC requires that the link encoder assignments remain cleared/invalid prior to commiting. Since the backup still has valid assignments we call the interface post reset to clear them. This routine also releases the extra reference that the link encoder interface held - resulting in a double free (and eventually a NULL pointer dereference).

[How] We'll have to do a full DC commit anyway after GPU reset because the stream count previously went to 0.

We don't need to retain the assignment that we had backed up, so just copy off of the now clean current state assignment after the reset has occcurred with the new link_enc_cfg_copy() interface.

CVSS Base Scores

version 3.1