CVE-2026-98082

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix the possible bioc_list memory leak during error

There are two possible ways to leak bioc memory on

btrfs_ordered_extent::bioc_list:

- An error occurred for btrfs_insert_one_raid_extent()

Then the function btrfs_insert_raid_extent() immediately return

without freeing any bioc in the bioc_list.

- An ordered extent hit an IO error

In that case the ordered extent will have BTRFS_ORDERED_IOERR set, and

skip the call on btrfs_insert_raid_extent() completely.

Fix the problem by:

- Introduce a new helper, btrfs_cleanup_ordered_bioc_list()

Which will remove all bioc from the bioc_list, and release the bioc.

- Call the above helper for btrfs_insert_raid_extent()

So that the cleanup helper is always called no matter what.

- Call the above helper for btrfs_finish_one_ordered()

This is called just before the final release on the ordered extent.

This was reported by Sashiko when reviewing another pa

/// 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