CVE-2024-47704: drm/amd/display: Check link_res->hpo_dp_link_enc before using it
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check link_res->hpo_dp_link_enc before using it [WHAT & HOW] Functions dp_enable_link_phy and dp_disable_link_phy can pass link_res without initializing hpo_dp_link_enc and it is necessary to check for null before dereferencing. This fixes 2 FORWARD_NULL issues reported by Coverity.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <6.6.55 | |
| Linux Kernel | >=6.7<6.10.14 | |
| Linux Kernel | >=6.11<6.11.2 | |
| 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/0508a4e95ac1aefd851ceb97ea050d8abb93262c
- https://git.kernel.org/stable/c/0beca868cde8742240cd0038141c30482d2b7eb8
- https://git.kernel.org/stable/c/530e29452b955c30cf2102fa4d07420dc6e0c953
- https://git.kernel.org/stable/c/be2ca7a2c1561390d28bf2f92654d819659ba510
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-47704
- https://nvd.nist.gov/vuln/detail/CVE-2024-47704
- https://launchpad.net/bugs/cve/CVE-2024-47704
- https://security-tracker.debian.org/tracker/CVE-2024-47704
- https://ubuntu.com/security/CVE-2024-47704
- https://git.kernel.org/linus/0beca868cde8742240cd0038141c30482d2b7eb8
Frequently Asked Questions
What is the severity of CVE-2024-47704?
CVE-2024-47704 has a moderate severity rating, indicating potential risks in the Linux kernel's functionality.
How do I fix CVE-2024-47704?
To fix CVE-2024-47704, update the Linux kernel to version 6.12.12-1 or later, along with specific Debian packages as detailed in release notes.
Which versions of Linux kernel are affected by CVE-2024-47704?
CVE-2024-47704 affects Linux kernel versions from 6.7 to 6.10.14 and 6.11 to 6.11.2.
What components in the Linux kernel are involved in CVE-2024-47704?
CVE-2024-47704 involves the drm/amd/display component, specifically related to the dp_enable_link_phy and dp_disable_link_phy functions.
What are the potential consequences of CVE-2024-47704?
Exploiting CVE-2024-47704 can lead to improper initialization of hardware resources, potentially impacting the stability of display outputs.
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