CVE-2026-80756 (GCVE-0-2026-80756)
Vulnerability from cvelistv5
Published
2026-09-03 08:26
Modified
2026-09-03 08:26
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 Version: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 Version: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 Version: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 Version: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 Version: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 Version: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 Version: 02a52c5c8c3b8cbad0f12009cde9f36dbefb6972 |
||
{
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"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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}
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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"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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