CVE-2024-49918: drm/amd/display: Add null check for head_pipe in dcn32_acquire_idle_pipe_for_head_pipe_in_layer
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null check for head_pipe in dcn32_acquire_idle_pipe_for_head_pipe_in_layer This commit addresses a potential null pointer dereference issue in the `dcn32_acquire_idle_pipe_for_head_pipe_in_layer` function. The issue could occur when `head_pipe` is null. The fix adds a check to ensure `head_pipe` is not null before asserting it. If `head_pipe` is null, the function returns NULL to prevent a potential null pointer dereference. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn32/dcn32_resource.c:2690 dcn32_acquire_idle_pipe_for_head_pipe_in_layer() error: we previously assumed 'head_pipe' could be null (see line 2681)
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <6.10.14 | |
| Linux Kernel | >=6.11<6.11.3 | |
| debian/linux | <=5.10.223-1<=5.10.226-1<=6.1.123-1<=6.1.128-1 | 6.12.12-1 6.12.15-1 |
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Reference Links
- https://git.kernel.org/stable/c/4f47292f488fa7041284dca1f1244116c18721f1
- https://git.kernel.org/stable/c/96d4c2ee18d732a248d053aae8c4a27cb1d68d1c
- https://git.kernel.org/stable/c/ac2140449184a26eac99585b7f69814bd3ba8f2d
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49918
- https://nvd.nist.gov/vuln/detail/CVE-2024-49918
- https://launchpad.net/bugs/cve/CVE-2024-49918
- https://security-tracker.debian.org/tracker/CVE-2024-49918
- https://ubuntu.com/security/CVE-2024-49918
- https://git.kernel.org/linus/ac2140449184a26eac99585b7f69814bd3ba8f2d
Frequently Asked Questions
What is the severity of CVE-2024-49918?
CVE-2024-49918 is classified as a medium severity vulnerability due to the potential for a null pointer dereference in the Linux kernel.
How do I fix CVE-2024-49918?
To fix CVE-2024-49918, upgrade to Linux Kernel versions 6.12.11-1 or 6.12.12-1, or apply available patches for earlier versions as listed in the specifications.
Which systems are affected by CVE-2024-49918?
CVE-2024-49918 affects Linux Kernel versions up to and including 6.10.14 and certain versions in the 6.11 range.
What is the impact of CVE-2024-49918?
The impact of CVE-2024-49918 includes potential system instability due to unexpected null pointer dereferences.
When was CVE-2024-49918 published?
CVE-2024-49918 was published in 2024 as part of ongoing security updates for the Linux kernel.
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