CVE-2026-80749
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.
Affected versions
Linux kernel versions
6.11
and later are affected. Fixed in
6.12.105,
6.18.46,
7.1.10,
7.2
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-80749?
CVE-2026-80749 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.11 onward and has been patched in 6.12.105, 6.18.46, 7.1.10 and others. CVE-2026-80749 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-80749?
Yes. CVE-2026-80749 has been patched. Fixed versions include 6.12.105, 6.18.46, 7.1.10 and others. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-80749 actively exploited?
No. CVE-2026-80749 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.