CVE-2026-98082

Summary

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 patch.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux02c372e1f016e5113217597ab37b399c4e407477 < 83f0c973cffb184d019390ffdb5d31de5c85bc61affected
LinuxLinux02c372e1f016e5113217597ab37b399c4e407477 < 1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0affected
LinuxLinux02c372e1f016e5113217597ab37b399c4e407477 < bb4da45766d16503821f167054db76b735d89e94affected
LinuxLinux02c372e1f016e5113217597ab37b399c4e407477 < afbe73778338e6d1ac8c4486fbdf33f0cc1f2624affected
LinuxLinuxab69bf6f8970c09d3735c25094e9471d54365282affected
LinuxLinux6.6.130 < 6.7affected
LinuxLinux6.7affected
LinuxLinux0 < 6.7unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc2 <= *unaffected

Weaknesses

References