CVE-2026-80749 (GCVE-0-2026-80749)
Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-09-03 08:26
VLAI
EPSS
VEX
Title
drm/connector/hdmi: Fix out of bounds memory read
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
f378b77227bc4732922c57f92be89438bb1018a1 , < d9f7454c185c0c7f0973e11d62ad6c06862c324c
(git)
Affected: f378b77227bc4732922c57f92be89438bb1018a1 , < e5b527804a1ea4f70e139179d3062cf5de8c06ab (git) Affected: f378b77227bc4732922c57f92be89438bb1018a1 , < f72bb95732bc5ca87b50c52c8f087ba501950809 (git) Affected: f378b77227bc4732922c57f92be89438bb1018a1 , < 9ecf8ba763d0ffe0673538eb4bf7806f20455d19 (git) |
guessed | |
| Linux | Linux |
Affected:
6.11
Unaffected: 0 , < 6.11 (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/gpu/drm/display/drm_hdmi_state_helper.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "f378b77227bc4732922c57f92be89438bb1018a1",
"versionType": "git"
},
{
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"status": "affected",
"version": "f378b77227bc4732922c57f92be89438bb1018a1",
"versionType": "git"
},
{
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"status": "affected",
"version": "f378b77227bc4732922c57f92be89438bb1018a1",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
}
]
},
{
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"product": "Linux",
"programFiles": [
"drivers/gpu/drm/display/drm_hdmi_state_helper.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.105",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.46",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
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"versionEndExcluding": "6.12.105",
"versionStartIncluding": "6.11",
"vulnerable": true
},
{
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"versionEndExcluding": "6.18.46",
"versionStartIncluding": "6.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.10",
"versionStartIncluding": "6.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "6.11",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/connector/hdmi: Fix out of bounds memory read\n\nA helper function was copying a given audio infoframe into the\nconnector\u0027s copy but using the size of the destination (a generic\ntarget, sized to accept many different data blocks) not the source (a\nvery specific type of data block). Thus, it was copying 60 bytes of\ndata from a 28 byte allocation.\n\nFix that by using the source size instead, together with a build bug\non the source size actually being smaller than the destination.\n\nI hit this running KUnit tests under KASAN (while debugging something\nelse entirely). In the real world, it seems unlikely to cause an\nactual problem. It is a read not a write so it can\u0027t corrupt any\nmemory. However, it could potentially fall off the end of a page and\ncause an accvio bug."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-03T08:26:30.140Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/d9f7454c185c0c7f0973e11d62ad6c06862c324c"
},
{
"url": "https://git.kernel.org/stable/c/e5b527804a1ea4f70e139179d3062cf5de8c06ab"
},
{
"url": "https://git.kernel.org/stable/c/f72bb95732bc5ca87b50c52c8f087ba501950809"
},
{
"url": "https://git.kernel.org/stable/c/9ecf8ba763d0ffe0673538eb4bf7806f20455d19"
}
],
"title": "drm/connector/hdmi: Fix out of bounds memory read",
"x_generator": {
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-80749",
"datePublished": "2026-09-03T08:26:30.140Z",
"dateReserved": "2026-08-26T14:34:25.790Z",
"dateUpdated": "2026-09-03T08:26:30.140Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-80749",
"date": "2026-09-03",
"epss": "0.002",
"percentile": "0.0982"
},
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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