CVE intelligence

CVE-2026-80749

Vulnerability intelligence

Published Sep 3, 2026Sources checked Nov 3, 2026

7.1HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-80749 and is rated High severity with a CVSS score of 7.1. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.1%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is 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.

Source: NVD