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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-27041
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-05-01 13:15:49 UTC
Updated2026-10-30 13:17:25 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from ADP

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-476 | CWE-476 CWE-476 NULL Pointer Dereference

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 81927e2808be5adace93c2012d45d6938d3a7aa0 cef0f2fe65ccee638e48fd5c1d590a3c0539acdd git Not specified
CNA Linux Linux affected 81927e2808be5adace93c2012d45d6938d3a7aa0 e040f1fbe9abae91b12b074cfc3bbb5367b79811 git Not specified
CNA Linux Linux affected 81927e2808be5adace93c2012d45d6938d3a7aa0 ca2eb375db76fd50f31afdd67d6ca4f833254957 git Not specified
CNA Linux Linux affected 81927e2808be5adace93c2012d45d6938d3a7aa0 1c62697e4086de988b31124fb8c79c244ea05f2b git Not specified
CNA Linux Linux affected 81927e2808be5adace93c2012d45d6938d3a7aa0 2a3cfb9a24a28da9cc13d2c525a76548865e182c git Not specified
CNA Linux Linux affected 5.14 Not specified
CNA Linux Linux unaffected 5.14 semver Not specified
CNA Linux Linux unaffected 6.1.191 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.23 6.6.* semver Not specified
CNA Linux Linux unaffected 6.7.11 6.7.* semver Not specified
CNA Linux Linux unaffected 6.8.2 6.8.* semver Not specified
CNA Linux Linux unaffected 6.9 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e040f1fbe9abae91b12b074cfc3bbb5367b79811 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/2a3cfb9a24a28da9cc13d2c525a76548865e182c af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/ca2eb375db76fd50f31afdd67d6ca4f833254957 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/cef0f2fe65ccee638e48fd5c1d590a3c0539acdd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1c62697e4086de988b31124fb8c79c244ea05f2b af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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