# CVE-2026-46302: selinux: allow multiple opens of /sys/fs/selinux/policy

CVE-2026-46302 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-46302, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-46302
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 8, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46302

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2026-46302](https://patchblox.com/security/data/fix/linux/debian-cve-2026-46302.md) | Jun 24, 2026 |
| Linux | linux Debian 14 | 7.0.7-1 | [DEBIAN-CVE-2026-46302](https://patchblox.com/security/data/fix/linux/debian-cve-2026-46302.md) | Jun 24, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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