Use After Free 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-LINUX612-20506519
- published5 Oct 2026
- disclosed25 Sept 2026
Introduced: 25 Sep 2026
NewCVE-2026-98083 (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:
btrfs: fix transaction use-after-free in raid stripe insertion
If allocation of a RAID stripe extent fails, btrfs_insert_one_raid_extent() aborts and ends the transaction before returning -ENOMEM.
btrfs_finish_one_ordered(), the production caller through btrfs_insert_raid_extent(), still owns the transaction handle. It handles the error by aborting the transaction and then reaches the common exit path, which ends the transaction again.
The premature end can free the handle and drop its transaction reference. Transaction cleanup can then free the transaction before the caller's second abort accesses the handle and transaction, resulting in use-after-free.
Keep the abort at the failure site, but let the caller's common exit path end the transaction once, after it has finished using both objects.
References
- https://security-tracker.debian.org/tracker/CVE-2026-98083
- https://git.kernel.org/stable/c/089d9c45ea49ffffe55a8fe08d0ce2536626e90a
- https://git.kernel.org/stable/c/2fbfd02bdfe12b20bd3cc7a3190fb32e3f7072f5
- https://git.kernel.org/stable/c/a8813a923f9e43f788b357fb55c35f7f6ed6f98c
- https://git.kernel.org/stable/c/b185bdf30313e213fa1c887fe22fc3d513c061d9
- https://git.kernel.org/stable/c/b7b94923b3b5774d85a2a7c8d6eb9e3e0ef66685