CVE-2026-80756 (GCVE-0-2026-80756)
Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-09-03 08:26
VLAI
EPSS
VEX
Title
selinux: do not cancel a policy conversion that never started
Summary
In the Linux kernel, the following vulnerability has been resolved:
selinux: do not cancel a policy conversion that never started
sel_write_load() calls selinux_policy_cancel() when sel_make_policy_nodes()
fails, and that helper dereferences the outgoing policy to cancel its
sidtab conversion. On the first policy load there is no outgoing policy:
security_load_policy() returns early for that case, before it converts
anything, and state->policy is still NULL. A first load that fails while
building the selinuxfs tree therefore takes a NULL dereference in
selinux_policy_cancel(), reached from a write(2) to /sys/fs/selinux/load.
Skip the cancel when there is no old policy, mirroring the check
security_load_policy() already makes before it converts.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 2d29983104f06f5b0babcd5a25a0f0408272cd27
(git)
Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < a4f182f8715cb0819445f0850cd5436828f4bafc (git) Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 1059789ae9f99cbbe3a78e361e9c0976beb5958b (git) Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 1acc317d67a755a45e32419a15d70e403fa43f0e (git) Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < a42932c6aa33d0aac683cacdf1ec7009b955ba5d (git) Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 1b4ff94ae7c580c880291519fb0e3e2bd075beef (git) Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < 219c96de5d9b6b4af7e8576ad897b774cc3ee9a7 (git) Affected: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 , < e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e (git) |
guessed | |
| Linux | Linux |
Affected:
5.10
Unaffected: 0 , < 5.10 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.153 , ≤ 6.6.* (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": [
"security/selinux/ss/services.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"versionType": "git"
},
{
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"versionType": "git"
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{
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"versionType": "git"
},
{
"lessThan": "219c96de5d9b6b4af7e8576ad897b774cc3ee9a7",
"status": "affected",
"version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
"versionType": "git"
},
{
"lessThan": "e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e",
"status": "affected",
"version": "02a52c5c8c3b8cbad0f12009cde9f36dbefb6972",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"security/selinux/ss/services.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.10"
},
{
"lessThan": "5.10",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.266",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.184",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.153",
"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": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.266",
"versionStartIncluding": "5.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.217",
"versionStartIncluding": "5.10",
"vulnerable": true
},
{
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"versionEndExcluding": "6.1.184",
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},
{
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},
{
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.46",
"versionStartIncluding": "5.10",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.10",
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},
{
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"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: do not cancel a policy conversion that never started\n\nsel_write_load() calls selinux_policy_cancel() when sel_make_policy_nodes()\nfails, and that helper dereferences the outgoing policy to cancel its\nsidtab conversion. On the first policy load there is no outgoing policy:\nsecurity_load_policy() returns early for that case, before it converts\nanything, and state-\u003epolicy is still NULL. A first load that fails while\nbuilding the selinuxfs tree therefore takes a NULL dereference in\nselinux_policy_cancel(), reached from a write(2) to /sys/fs/selinux/load.\n\nSkip the cancel when there is no old policy, mirroring the check\nsecurity_load_policy() already makes before it converts."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-03T08:26:34.396Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/2d29983104f06f5b0babcd5a25a0f0408272cd27"
},
{
"url": "https://git.kernel.org/stable/c/a4f182f8715cb0819445f0850cd5436828f4bafc"
},
{
"url": "https://git.kernel.org/stable/c/1059789ae9f99cbbe3a78e361e9c0976beb5958b"
},
{
"url": "https://git.kernel.org/stable/c/1acc317d67a755a45e32419a15d70e403fa43f0e"
},
{
"url": "https://git.kernel.org/stable/c/a42932c6aa33d0aac683cacdf1ec7009b955ba5d"
},
{
"url": "https://git.kernel.org/stable/c/1b4ff94ae7c580c880291519fb0e3e2bd075beef"
},
{
"url": "https://git.kernel.org/stable/c/219c96de5d9b6b4af7e8576ad897b774cc3ee9a7"
},
{
"url": "https://git.kernel.org/stable/c/e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e"
}
],
"title": "selinux: do not cancel a policy conversion that never started",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80756",
"datePublished": "2026-09-03T08:26:34.396Z",
"dateReserved": "2026-08-26T14:34:25.791Z",
"dateUpdated": "2026-09-03T08:26:34.396Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-80756",
"date": "2026-09-03",
"epss": "0.0021",
"percentile": "0.11176"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-80756\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-03T13:06:15.360\",\"lastModified\":\"2026-09-03T13:06:15.360\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nselinux: do not cancel a policy conversion that never started\\n\\nsel_write_load() calls selinux_policy_cancel() when sel_make_policy_nodes()\\nfails, and that helper dereferences the outgoing policy to cancel its\\nsidtab conversion. On the first policy load there is no outgoing policy:\\nsecurity_load_policy() returns early for that case, before it converts\\nanything, and state-\u003epolicy is still NULL. A first load that fails while\\nbuilding the selinuxfs tree therefore takes a NULL dereference in\\nselinux_policy_cancel(), reached from a write(2) to /sys/fs/selinux/load.\\n\\nSkip the cancel when there is no old policy, mirroring the check\\nsecurity_load_policy() already makes before it converts.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"security/selinux/ss/services.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972\",\"lessThan\":\"2d29983104f06f5b0babcd5a25a0f0408272cd27\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972\",\"lessThan\":\"a4f182f8715cb0819445f0850cd5436828f4bafc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972\",\"lessThan\":\"1059789ae9f99cbbe3a78e361e9c0976beb5958b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972\",\"lessThan\":\"1acc317d67a755a45e32419a15d70e403fa43f0e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972\",\"lessThan\":\"a42932c6aa33d0aac683cacdf1ec7009b955ba5d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972\",\"lessThan\":\"1b4ff94ae7c580c880291519fb0e3e2bd075beef\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972\",\"lessThan\":\"219c96de5d9b6b4af7e8576ad897b774cc3ee9a7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02a52c5c8c3b8cbad0f12009cde9f36dbefb6972\",\"lessThan\":\"e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"security/selinux/ss/services.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.266\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.217\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.153\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.105\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.46\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.10\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1059789ae9f99cbbe3a78e361e9c0976beb5958b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1acc317d67a755a45e32419a15d70e403fa43f0e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1b4ff94ae7c580c880291519fb0e3e2bd075beef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/219c96de5d9b6b4af7e8576ad897b774cc3ee9a7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2d29983104f06f5b0babcd5a25a0f0408272cd27\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a42932c6aa33d0aac683cacdf1ec7009b955ba5d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a4f182f8715cb0819445f0850cd5436828f4bafc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e5c0235a3c4e9eb047a16cd02323fe4ecf2f570e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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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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