CVE-2022-49232

drm/amd/display: Fix a NULL pointer dereference in amdgpu_dm_connector_add_common_modes()

State: Published
Severity: 5.5 Medium
Published: Feb 26, 2025
Updated: May 11, 2026
Reserved: Feb 26, 2025

Description

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

drm/amd/display: Fix a NULL pointer dereference in amdgpu_dm_connector_add_common_modes()

In amdgpu_dm_connector_add_common_modes(), amdgpu_dm_create_common_mode() is assigned to mode and is passed to drm_mode_probed_add() directly after that. drm_mode_probed_add() passes &mode->head to list_add_tail(), and there is a dereference of it in list_add_tail() without recoveries, which could lead to NULL pointer dereference on failure of amdgpu_dm_create_common_mode().

Fix this by adding a NULL check of mode.

This bug was found by a static analyzer.

Builds with 'make allyesconfig' show no new warnings, and our static analyzer no longer warns about this code.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
LinuxLinux	e7b07ceef2a650e5ed8ca37997689e086c680daf to before 2c729dec8c1e3e2892fde5ce8181553860914e74Affected e7b07ceef2a650e5ed8ca37997689e086c680daf to before 57f4ad5e286fe4599c8fc63cf89f85f9eec7f9c9Affected e7b07ceef2a650e5ed8ca37997689e086c680daf to before 19a7eba284790cfbba2945deb2363cf03ce41648Affected e7b07ceef2a650e5ed8ca37997689e086c680daf to before bdc7429708a0772d90c208975694f7c2133b1202Affected e7b07ceef2a650e5ed8ca37997689e086c680daf to before f4eaa999fec78dec2a9c2d797438e05cbffb125bAffected e7b07ceef2a650e5ed8ca37997689e086c680daf to before 639b3b9def0a6a3f316a195d705d14113236e89cAffected e7b07ceef2a650e5ed8ca37997689e086c680daf to before 588a70177df3b1777484267584ef38ab2ca899a2Affected
LinuxLinux	4.15Affected before 4.15Not affected 4.19.238 through 4.19.Not affected 5.4.189 through 5.4.Not affected 5.10.110 through 5.10.Not affected 5.15.33 through 5.15.Not affected 5.16.19 through 5.16.Not affected 5.17.2 through 5.17.Not affected 5.18 and laterNot affected

Product

Versions

LinuxLinux

e7b07ceef2a650e5ed8ca37997689e086c680daf to before 2c729dec8c1e3e2892fde5ce8181553860914e74Affected
e7b07ceef2a650e5ed8ca37997689e086c680daf to before 57f4ad5e286fe4599c8fc63cf89f85f9eec7f9c9Affected
e7b07ceef2a650e5ed8ca37997689e086c680daf to before 19a7eba284790cfbba2945deb2363cf03ce41648Affected
e7b07ceef2a650e5ed8ca37997689e086c680daf to before bdc7429708a0772d90c208975694f7c2133b1202Affected
e7b07ceef2a650e5ed8ca37997689e086c680daf to before f4eaa999fec78dec2a9c2d797438e05cbffb125bAffected
e7b07ceef2a650e5ed8ca37997689e086c680daf to before 639b3b9def0a6a3f316a195d705d14113236e89cAffected
e7b07ceef2a650e5ed8ca37997689e086c680daf to before 588a70177df3b1777484267584ef38ab2ca899a2Affected

LinuxLinux

4.15Affected
before 4.15Not affected
4.19.238 through 4.19.*Not affected
5.4.189 through 5.4.*Not affected
5.10.110 through 5.10.*Not affected
5.15.33 through 5.15.*Not affected
5.16.19 through 5.16.*Not affected
5.17.2 through 5.17.*Not affected
5.18 and laterNot affected

References

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