# CVE-2026-43189: media: v4l2-async: Fix error handling on steps after finding a match

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-05-06 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.6

## Description

In the Linux kernel, the following vulnerability has been resolved: media: v4l2-async: Fix error handling on steps after finding a match Once an async connection is found to be matching with an fwnode, a sub-device may be registered (in case it wasn't already), its bound operation is called, ancillary links are created, the async connection is added to the sub-device's list of connections and removed from the global waiting connection list. Further on, the sub-device's possible own notifier is searched for possible additional matches. Fix these specific issues: - If v4l2_async_match_notify() failed before the sub-notifier handling, the async connection was unbound and its entry removed from the sub-device's async connection list. The latter part was also done in v4l2_async_match_notify(). - The async connection's sd field was only set after creating ancillary links in v4l2_async_match_notify(). It was however dereferenced in v4l2_async_unbind_subdev_one(), which was called on error path of v4l2_async_match_notify() failure.

## 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.
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## 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/30aaed311f973f13ba13a0cd2dc0202f595fff48
- https://git.kernel.org/stable/c/461733d83e67ba7e3a5b750c0d203f738e01244f
- https://git.kernel.org/stable/c/b02bcb378efa8af07827f49b3afcc5e825318c55
- https://git.kernel.org/stable/c/2de0a3c8148fc3dbea21981e6569f550b3626119
- https://git.kernel.org/stable/c/7345d6d356336c448d6b9230ed8704f39679fd12

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Page: https://cve.now/CVE-2026-43189
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