Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/connector/hdmi: Fix out of bounds memory read A helper function was copying a given audio infoframe into the connector's copy but using the size of the destination (a generic target, sized to accept many different data blocks) not the source (a very specific type of data block). Thus, it was copying 60 bytes of data from a 28 byte allocation. Fix that by using the source size instead, together with a build bug on the source size actually being smaller than the destination. I hit this running KUnit tests under KASAN (while debugging something else entirely). In the real world, it seems unlikely to cause an actual problem. It is a read not a write so it can't corrupt any memory. However, it could potentially fall off the end of a page and cause an accvio bug.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/9ecf8ba763d0ffe0673538eb4bf7806f20455d19
- https://git.kernel.org/stable/c/d9f7454c185c0c7f0973e11d62ad6c06862c324c
- https://git.kernel.org/stable/c/e5b527804a1ea4f70e139179d3062cf5de8c06ab
- https://git.kernel.org/stable/c/f72bb95732bc5ca87b50c52c8f087ba501950809
FAQ
What is CVE-2026-80749?
CVE-2026-80749 is a vulnerability with a CVSS score of 7.1 (HIGH). In the Linux kernel, the following vulnerability has been resolved: drm/connector/hdmi: Fix out of bounds memory read A helper function was copying a given audio infoframe into the connector's copy ...
How severe is CVE-2026-80749?
CVE-2026-80749 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-80749?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.