5.5

CVE-2024-27041

drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini()

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

drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini()

Since 'adev->dm.dc' in amdgpu_dm_fini() might turn out to be NULL
before the call to dc_enable_dmub_notifications(), check
beforehand to ensure there will not be a possible NULL-ptr-deref
there.

Also, since commit 1e88eb1b2c25 ("drm/amd/display: Drop
CONFIG_DRM_AMD_DC_HDCP") there are two separate checks for NULL in
'adev->dm.dc' before dc_deinit_callbacks() and dc_dmub_srv_destroy().
Clean up by combining them all under one 'if'.

Found by Linux Verification Center (linuxtesting.org) with static
analysis tool SVACE.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.14 < 6.6.23
Linux ≫ Linux Kernel Version >= 6.7 < 6.7.11
Linux ≫ Linux Kernel Version >= 6.8 < 6.8.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.27% 0.187
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
CISA-ADP 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/1c62697e4086de988b31124fb8c79c244ea05f2b
Patch
https://git.kernel.org/stable/c/2a3cfb9a24a28da9cc13d2c525a76548865e182c
Patch
https://git.kernel.org/stable/c/ca2eb375db76fd50f31afdd67d6ca4f833254957
Patch
https://git.kernel.org/stable/c/e040f1fbe9abae91b12b074cfc3bbb5367b79811
Patch