CVE-2026-98083

btrfs: fix transaction use-after-free in raid stripe insertion

State: Published
Severity: 7.0 High
Published: Sep 25, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.0 High	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ab69bf6f8970c09d3735c25094e9471d54365282 to before 089d9c45ea49ffffe55a8fe08d0ce2536626e90aAffected 02c372e1f016e5113217597ab37b399c4e407477 to before b185bdf30313e213fa1c887fe22fc3d513c061d9Affected 02c372e1f016e5113217597ab37b399c4e407477 to before 2fbfd02bdfe12b20bd3cc7a3190fb32e3f7072f5Affected 02c372e1f016e5113217597ab37b399c4e407477 to before b7b94923b3b5774d85a2a7c8d6eb9e3e0ef66685Affected 02c372e1f016e5113217597ab37b399c4e407477 to before a8813a923f9e43f788b357fb55c35f7f6ed6f98cAffected 6.6.130 to before 6.6.158Affected
LinuxLinux	6.7Affected before 6.7Not affected 6.6.158 through 6.6.Not affected 6.12.111 through 6.12.Not affected 6.18.53 through 6.18.Not affected 7.2.7 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

ab69bf6f8970c09d3735c25094e9471d54365282 to before 089d9c45ea49ffffe55a8fe08d0ce2536626e90aAffected
02c372e1f016e5113217597ab37b399c4e407477 to before b185bdf30313e213fa1c887fe22fc3d513c061d9Affected
02c372e1f016e5113217597ab37b399c4e407477 to before 2fbfd02bdfe12b20bd3cc7a3190fb32e3f7072f5Affected
02c372e1f016e5113217597ab37b399c4e407477 to before b7b94923b3b5774d85a2a7c8d6eb9e3e0ef66685Affected
02c372e1f016e5113217597ab37b399c4e407477 to before a8813a923f9e43f788b357fb55c35f7f6ed6f98cAffected
6.6.130 to before 6.6.158Affected

LinuxLinux

6.7Affected
before 6.7Not affected
6.6.158 through 6.6.*Not affected
6.12.111 through 6.12.*Not affected
6.18.53 through 6.18.*Not affected
7.2.7 through 7.2.*Not affected
7.3 and laterNot affected

References

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