selinux: allow multiple opens of /sys/fs/selinux/policy
In the Linux kernel, the following vulnerability has been resolved: selinux: allow multiple opens of /sys/fs/selinux/policy Currently there can only be a single open of /sys/fs/selinux/policy at any time. This allows any process to block any other process from reading the kernel policy. The original motivation seems to have been a mix of preventing an inconsistent view of the policy size and preventing userspace from allocating kernel memory without bound, but this is arguably equally bad. Eliminate the policy_opened flag and shrink the critical section that the policy mutex is held. While we are making changes here, drop a couple of extraneous BUG_ONs.
CVE-2026-46302
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-46302
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a",
"lessThan": "d8cafd0226d5df682d1f4ea978a4318fe3a11210",
"versionType": "git"
},
{
"status": "affected",
"version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a",
"lessThan": "0ed712134a3db0075bfe9a0f8536c48728ec745e",
"versionType": "git"
},
{
"status": "affected",
"version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a",
"lessThan": "c24d2e190b955baf3a95e05d34b192f61bd201b3",
"versionType": "git"
},
{
"status": "affected",
"version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a",
"lessThan": "714362f3779dfa453a78ced32396a72726962a41",
"versionType": "git"
},
{
"status": "affected",
"version": "cee74f47a6baba0ac457e87687fdcf0abd599f0a",
"lessThan": "a02cd6805562305f936e807da83e253b719dd965",
"versionType": "git"
}
],
"programFiles": [
"security/selinux/selinuxfs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.37"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.37",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.58",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"security/selinux/selinuxfs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46302
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46341 · Revision 1
- Added to Heist Feed
- Publisher date