CVE-2024-56721: x86/CPU/AMD: Terminate the erratum_1386_microcode array
First published: Sun Dec 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Terminate the erratum_1386_microcode array The erratum_1386_microcode array requires an empty entry at the end. Otherwise x86_match_cpu_with_stepping() will continue iterate the array after it ended. Add an empty entry to erratum_1386_microcode to its end.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.10<6.11.11 | |
| Linux Kernel | >=6.12<6.12.2 | |
| 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/82d6b82cf89d950982ac240ba068c3a7e1f23b0a
- https://git.kernel.org/stable/c/ccfee14f08b8699132b87bc6d78e0fa75bf094dd
- https://git.kernel.org/stable/c/ff6cdc407f4179748f4673c39b0921503199a0ad
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56721
- https://nvd.nist.gov/vuln/detail/CVE-2024-56721
- https://launchpad.net/bugs/cve/CVE-2024-56721
- https://security-tracker.debian.org/tracker/CVE-2024-56721
- https://ubuntu.com/security/CVE-2024-56721
- https://git.kernel.org/linus/ff6cdc407f4179748f4673c39b0921503199a0ad
Frequently Asked Questions
What is the severity of CVE-2024-56721?
CVE-2024-56721 has a medium severity due to the potential for improper handling of CPU microcode which could lead to unexpected behavior.
How do I fix CVE-2024-56721?
To fix CVE-2024-56721, upgrade your Linux kernel to versions later than 6.11.11 or 6.12.2.
What systems are affected by CVE-2024-56721?
CVE-2024-56721 affects Linux kernel versions from 6.10 up to 6.11.11 and from 6.12 up to 6.12.2.
Is there a known exploit for CVE-2024-56721?
As of now, there are no public exploits reported for CVE-2024-56721.
What causes the vulnerability CVE-2024-56721?
CVE-2024-56721 is caused by an improperly sized erratum_1386_microcode array that lacks an empty entry, leading to potential out-of-bounds access.
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