CVE-2026-80755 (GCVE-0-2026-80755)
Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-09-03 08:26
VLAI
EPSS
VEX
Title
selinux: reject a permission value exceeding the class permission count
Summary
In the Linux kernel, the following vulnerability has been resolved:
selinux: reject a permission value exceeding the class permission count
perm_read() bounds a permission value by SEL_VEC_MAX but never by the
nprim of the owning class or common, which is taken verbatim from the
policy image. security_get_permissions() then writes perms[value - 1]
into an nprim-sized kcalloc() array, so a class declaring fewer
permissions than its largest permission value drives an out-of-bounds
heap write. The top-level symbol tables are validated this way; the
nested per-class permission table is not.
Reject a permission whose value exceeds nprim, which is already set when
perm_read() runs. Well-formed policies are unaffected.
[PM: tweak comment for line length]
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < 6c2ab7c4549f4f2305848df834e784651dbf1676
(git)
Affected: 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < dfc59a062c386d3d4415ecdab781065a645f33cc (git) Affected: 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e (git) Affected: 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 , < d14b5d0e97fccd27974fedc03b903408872907fd (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.23
Unaffected: 0 , < 2.6.23 (semver) Unaffected: 6.12.108 , ≤ 6.12.* (semver) Unaffected: 6.18.49 , ≤ 6.18.* (semver) Unaffected: 7.1.13 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"security/selinux/ss/policydb.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
"versionType": "git"
},
{
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"status": "affected",
"version": "55fcf09b3fe4325c9395ebbb0322a547a157ebc7",
"versionType": "git"
},
{
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
}
]
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{
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"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.23"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.108",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.49",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.13",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
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"versionEndExcluding": "6.12.108",
"versionStartIncluding": "2.6.23",
"vulnerable": true
},
{
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},
{
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"versionEndExcluding": "7.1.13",
"versionStartIncluding": "2.6.23",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "2.6.23",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: reject a permission value exceeding the class permission count\n\nperm_read() bounds a permission value by SEL_VEC_MAX but never by the\nnprim of the owning class or common, which is taken verbatim from the\npolicy image. security_get_permissions() then writes perms[value - 1]\ninto an nprim-sized kcalloc() array, so a class declaring fewer\npermissions than its largest permission value drives an out-of-bounds\nheap write. The top-level symbol tables are validated this way; the\nnested per-class permission table is not.\n\nReject a permission whose value exceeds nprim, which is already set when\nperm_read() runs. Well-formed policies are unaffected.\n\n[PM: tweak comment for line length]"
}
],
"providerMetadata": {
"dateUpdated": "2026-09-03T08:26:33.797Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/6c2ab7c4549f4f2305848df834e784651dbf1676"
},
{
"url": "https://git.kernel.org/stable/c/dfc59a062c386d3d4415ecdab781065a645f33cc"
},
{
"url": "https://git.kernel.org/stable/c/a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e"
},
{
"url": "https://git.kernel.org/stable/c/d14b5d0e97fccd27974fedc03b903408872907fd"
}
],
"title": "selinux: reject a permission value exceeding the class permission count",
"x_generator": {
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-80755",
"datePublished": "2026-09-03T08:26:33.797Z",
"dateReserved": "2026-08-26T14:34:25.790Z",
"dateUpdated": "2026-09-03T08:26:33.797Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-80755",
"date": "2026-09-03",
"epss": "0.002",
"percentile": "0.09822"
},
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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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