CVE-2026-98082
UnknownSummary
In the Linux kernel's btrfs filesystem, there is a memory leak of the bioc structure on the bioc_list of an ordered_extent. The bug can occur during RAID extent insertion or when an ordered extent encounters an I/O error, causing the bioc to not be freed.
Risk Assessment
Memory leak can lead to exhaustion of system resources, potentially resulting in system crash or performance degradation.
Recommendation
It is recommended to update the Linux kernel to a version with the fix that introduces a helper function to clean the bioc list and calls it in appropriate places.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS