CVE-2026-89874 Affecting linux-6.12 package, versions <6.12.111-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-20506645
- published5 Oct 2026
- disclosed16 Sept 2026
Introduced: 16 Sep 2026
NewCVE-2026-89874 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-89874
- https://git.kernel.org/stable/c/3345746e0957bce6c53644838e4955710a82a962
- https://git.kernel.org/stable/c/47d82b605351c0e04f6365e42c8ffe2fcfdba615
- https://git.kernel.org/stable/c/a57d94026cb4fd7b3d258f0db2ad391cbccfaba5
- https://git.kernel.org/stable/c/caac13f518d83974e9884d1eeda3d4cc3bb92978
- https://git.kernel.org/stable/c/d273571e531405426983c6a45ec635c7d0415eed