CVE-2024-27041

Summary

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.

Impact & exploitability

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

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/1c62697e4086de988b31124fb8c79c244ea05f2b ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/1c62697e4086de988b31124fb8c79c244ea05f2bPatch
• https://git.kernel.org/stable/c/2a3cfb9a24a28da9cc13d2c525a76548865e182cPatch
• https://git.kernel.org/stable/c/ca2eb375db76fd50f31afdd67d6ca4f833254957Patch
• https://git.kernel.org/stable/c/e040f1fbe9abae91b12b074cfc3bbb5367b79811Patch
• https://git.kernel.org/stable/c/cef0f2fe65ccee638e48fd5c1d590a3c0539acdd