VulnerabilityPublished 8 Jun 2026Updated 21 Oct 2026

CVE-2026-46302: Linux kernel · selinux: allow multiple opens of /sys/fs/selinux/policy

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in d8cafd0226d5df682d1f4ea978a4318fe3a11210 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in d8cafd0226d5df682d1f4ea978a4318fe3a11210, c24d2e190b955baf3a95e05d34b192f61bd201b3, a02cd6805562305f936e807da83e253b719dd965 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ cee74f47a6baba0ac457e87687fdcf0abd599f0a, < d8cafd0226d5df682d1f4ea978a4318fe3a11210	Fixed in d8cafd0226d5df682d1f4ea978a4318fe3a11210
LinuxLinux	Affected ≥ cee74f47a6baba0ac457e87687fdcf0abd599f0a, < c24d2e190b955baf3a95e05d34b192f61bd201b3	Fixed in c24d2e190b955baf3a95e05d34b192f61bd201b3
LinuxLinux	Affected ≥ cee74f47a6baba0ac457e87687fdcf0abd599f0a, < a02cd6805562305f936e807da83e253b719dd965	Fixed in a02cd6805562305f936e807da83e253b719dd965
LinuxLinux	Affected ≥ cee74f47a6baba0ac457e87687fdcf0abd599f0a, < 714362f3779dfa453a78ced32396a72726962a41	Fixed in 714362f3779dfa453a78ced32396a72726962a41
LinuxLinux	Affected ≥ cee74f47a6baba0ac457e87687fdcf0abd599f0a, < 0ed712134a3db0075bfe9a0f8536c48728ec745e	Fixed in 0ed712134a3db0075bfe9a0f8536c48728ec745e
LinuxLinux	Affected =2.6.37	Fixed in–

Description

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.

References

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