CVE-2026-46302

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-25)

Published

2026-06-08

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/0ed712134a3db0075bfe9a0f8536c48728ec745e
• https://git.kernel.org/stable/c/714362f3779dfa453a78ced32396a72726962a41
• https://git.kernel.org/stable/c/a02cd6805562305f936e807da83e253b719dd965
• https://git.kernel.org/stable/c/c24d2e190b955baf3a95e05d34b192f61bd201b3
• https://git.kernel.org/stable/c/d8cafd0226d5df682d1f4ea978a4318fe3a11210

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