CVE-2026-46302

MediumCVSS 5.5/10Last modified Nov 6, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= cee74f47a6baba0ac457e87687fdcf0abd599f0a, < 9795810d116bc9071485929ba6471dc8d5bd158b; >= cee74f47a6baba0ac457e87687fdcf0abd599f0a, < d8cafd0226d5df682d1f4ea978a4318fe3a11210; >= cee74f47a6baba0ac457e87687fdcf0abd599f0a, < 0ed712134a3db0075bfe9a0f8536c48728ec745e; >= cee74f47a6baba0ac457e87687fdcf0abd599f0a, < c24d2e190b955baf3a95e05d34b192f61bd201b3; >= cee74f47a6baba0ac457e87687fdcf0abd599f0a, < 714362f3779dfa453a78ced32396a72726962a41; >= cee74f47a6baba0ac457e87687fdcf0abd599f0a, < a02cd6805562305f936e807da83e253b719dd965
LinuxLinux2.6.37

References

Timeline

Published
Jun 8, 2026
Last modified
Nov 6, 2026
NVD status
Modified

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CVE-2026-46302: Medium severity, CVSS 5.5 | Vulnix