CVE-2026-98083

/// Technical 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.

/// Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// Affected products

/// References