CVE-2024-44955: drm/amd/display: Don't refer to dc_sink in is_dsc_need_re_compute
First published: Wed Sep 04 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Don't refer to dc_sink in is_dsc_need_re_compute [Why] When unplug one of monitors connected after mst hub, encounter null pointer dereference. It's due to dc_sink get released immediately in early_unregister() or detect_ctx(). When commit new state which directly referring to info stored in dc_sink will cause null pointer dereference. [how] Remove redundant checking condition. Relevant condition should already be covered by checking if dsc_aux is null or not. Also reset dsc_aux to NULL when the connector is disconnected.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <6.10.5 | |
| debian/linux | <=5.10.223-1<=5.10.234-1<=6.1.129-1<=6.1.133-1 | 6.12.22-1 |
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Reference Links
- https://git.kernel.org/stable/c/c7e65cab54a89f4df54110f0b44c4ade93d1a911
- https://git.kernel.org/stable/c/39b217193729aa45eded8de24d9245468a0c0263
- https://git.kernel.org/stable/c/fcf6a49d79923a234844b8efe830a61f3f0584e4
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-44955
- https://nvd.nist.gov/vuln/detail/CVE-2024-44955
- https://launchpad.net/bugs/cve/CVE-2024-44955
- https://security-tracker.debian.org/tracker/CVE-2024-44955
- https://ubuntu.com/security/CVE-2024-44955
- https://git.kernel.org/linus/fcf6a49d79923a234844b8efe830a61f3f0584e4
Frequently Asked Questions
What is the severity of CVE-2024-44955?
CVE-2024-44955 has been classified with a severity that necessitates prompt attention due to its potential impact on system stability.
How do I fix CVE-2024-44955?
To fix CVE-2024-44955, upgrade the Linux kernel to version 6.10.5 or later, where this vulnerability has been resolved.
What does CVE-2024-44955 affect?
CVE-2024-44955 affects the Linux kernel prior to version 6.10.5, specifically regarding display handling when monitors are unplugged.
What exploit does CVE-2024-44955 enable?
CVE-2024-44955 could potentially enable a null pointer dereference when a monitor is unplugged, leading to a system crash.
Was CVE-2024-44955 actively exploited in the wild?
As of now, there are no confirmed reports indicating that CVE-2024-44955 has been actively exploited in the wild.
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