Strix
63.8K

CVE-2026-89874

Unknown

Last modified

CVE-2026-89874 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: media: v4l2-async: avoid deleting unlinked ASC entry on link error v4l2_async_match_notify() creates ancillary media links before adding asc->asc_subdev_entry to sd->asc_list. If ancillary link creation fails, the function jumps to err_call_unbind while asc_subdev_entry has not been linked yet. Async connections are zero-allocated, so the list entry still has NULL next and prev pointers on this path.

Description

In the Linux kernel, the following vulnerability has been resolved: media: v4l2-async: avoid deleting unlinked ASC entry on link error v4l2_async_match_notify() creates ancillary media links before adding asc->asc_subdev_entry to sd->asc_list. If ancillary link creation fails, the function jumps to err_call_unbind while asc_subdev_entry has not been linked yet. Async connections are zero-allocated, so the list entry still has NULL next and prev pointers on this path. Calling list_del() on it can therefore dereference NULL instead of returning the original link creation error. Do not delete asc_subdev_entry from err_call_unbind. There is no list insertion to undo on this path; the bound callback and sub-device registration are the operations that need to be rolled back.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 28a1295795d85a25f2e7dd391c43969e95fcb341, < d273571e531405426983c6a45ec635c7d0415eed; >= 28a1295795d85a25f2e7dd391c43969e95fcb341, < caac13f518d83974e9884d1eeda3d4cc3bb92978; >= 28a1295795d85a25f2e7dd391c43969e95fcb341, < 3345746e0957bce6c53644838e4955710a82a962; >= 28a1295795d85a25f2e7dd391c43969e95fcb341, < a57d94026cb4fd7b3d258f0db2ad391cbccfaba5; >= 28a1295795d85a25f2e7dd391c43969e95fcb341, < 47d82b605351c0e04f6365e42c8ffe2fcfdba615
LinuxLinux6.6

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89874?
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-async: avoid deleting unlinked ASC entry on link error v4l2_async_match_notify() creates ancillary media links before adding asc->asc_subdev_entry to sd->asc_list. If ancillary link creation fails, the function jumps to err_call_unbind while asc_subdev_entry has not been linked yet. Async connections are zero-allocated, so the list entry still has NULL next and prev pointers on this path. Calling list_del() on it can therefore dereference NULL instead of returning the original link creation error. Do not delete asc_subdev_entry from err_call_unbind. There is no list insertion to undo on this path; the bound callback and sub-device registration are the operations that need to be rolled back.
How severe is CVE-2026-89874?
Severity scoring for CVE-2026-89874 is pending analysis.
How do I fix CVE-2026-89874?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-89874?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST