Linux Kernel up to 6.12.104/6.18.45/7.1.9 HDMI Connector drm/connector/hdmi memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.104/6.18.45/7.1.9. It has been classified as problematic. This issue affects some unknown processing of the file drm/connector/hdmi of the component HDMI Connector. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2026-80749. The attack is restricted to local execution. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.104/6.18.45/7.1.9. It has been declared as problematic. Affected by this vulnerability is an unknown code block of the file drm/connector/hdmi of the component HDMI Connector. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-80749 since 08/26/2026. The exploitation appears to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/07/2026).

The vulnerability scanner Nessus provides a plugin with the ID 343062 (Linux Distros Unpatched Vulnerability : CVE-2026-80749), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.105, 6.18.46 or 7.1.10 eliminates this vulnerability. Applying the patch d9f7454c185c0c7f0973e11d62ad6c06862c324c/e5b527804a1ea4f70e139179d3062cf5de8c06ab/f72bb95732bc5ca87b50c52c8f087ba501950809/9ecf8ba763d0ffe0673538eb4bf7806f20455d19 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (343062). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (Linux): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 343062
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-80749

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.105/6.18.46/7.1.10
Patch: d9f7454c185c0c7f0973e11d62ad6c06862c324c/e5b527804a1ea4f70e139179d3062cf5de8c06ab/f72bb95732bc5ca87b50c52c8f087ba501950809/9ecf8ba763d0ffe0673538eb4bf7806f20455d19

Timelineinfo

08/26/2026 CVE reserved
09/03/2026 +8 days Advisory disclosed
09/03/2026 +0 days VulDB entry created
09/07/2026 +4 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80749 (🔒)
GCVE (CVE): GCVE-0-2026-80749
GCVE (VulDB): GCVE-100-398347

Entryinfo

Created: 09/03/2026 10:57
Updated: 09/07/2026 06:34
Changes: 09/03/2026 10:57 (59), 09/06/2026 13:26 (2), 09/07/2026 06:34 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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