CVE-2022-49232: drm/amd/display: Fix a NULL pointer dereference in amdgpu_dm_connector_add_common_modes()
First published: Wed Feb 26 2025(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=4.15<4.19.238 | |
| Linux Kernel | >=4.20<5.4.189 | |
| Linux Kernel | >=5.5<5.10.110 | |
| Linux Kernel | >=5.11<5.15.33 | |
| Linux Kernel | >=5.16<5.16.19 | |
| Linux Kernel | >=5.17<5.17.2 |
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Reference Links
- https://git.kernel.org/stable/c/2c729dec8c1e3e2892fde5ce8181553860914e74
- https://git.kernel.org/stable/c/57f4ad5e286fe4599c8fc63cf89f85f9eec7f9c9
- https://git.kernel.org/stable/c/19a7eba284790cfbba2945deb2363cf03ce41648
- https://git.kernel.org/stable/c/bdc7429708a0772d90c208975694f7c2133b1202
- https://git.kernel.org/stable/c/f4eaa999fec78dec2a9c2d797438e05cbffb125b
- https://git.kernel.org/stable/c/639b3b9def0a6a3f316a195d705d14113236e89c
- https://git.kernel.org/stable/c/588a70177df3b1777484267584ef38ab2ca899a2
Frequently Asked Questions
What is the severity of CVE-2022-49232?
CVE-2022-49232 has been classified as a high severity vulnerability due to its potential to cause a NULL pointer dereference.
How do I fix CVE-2022-49232?
To fix CVE-2022-49232, you should upgrade to a patched version of the Linux kernel that addresses this vulnerability.
Which Linux kernel versions are affected by CVE-2022-49232?
CVE-2022-49232 affects multiple versions of the Linux kernel, specifically between versions 4.15 and 5.17.
What impact does CVE-2022-49232 have on system stability?
CVE-2022-49232 can lead to system instability by causing kernel crashes due to a NULL pointer dereference.
Is CVE-2022-49232 exploitable remotely?
CVE-2022-49232 is not specifically detailed as a remote exploit; however, its impact on system components can have broader implications.
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