btrfs: fix the possible bioc_list memory leak during error (CVE-2026-98082) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-98082

btrfs: fix the possible bioc_list memory leak during error

Answer in brief

CVE-2026-98082 records a Unknown severity vulnerability in btrfs: fix the possible bioc_list memory leak during error. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=02c372e1f016e5113217597ab37b399c4e407477 <83f0c973cffb184d019390ffdb5d31de5c85bc61 \|\| >=02c372e1f016e5113217597ab37b399c4e407477 <1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0 \|\| >=02c372e1f016e5113217597ab37b399c4e407477 <bb4da45766d16503821f167054db76b735d89e94 \|\| >=02c372e1f016e5113217597ab37b399c4e407477 <afbe73778338e6d1ac8c4486fbdf33f0cc1f2624 \|\| ab69bf6f8970c09d3735c25094e9471d54365282 \|\| >=6.6.130 <6.7	83f0c973cffb184d019390ffdb5d31de5c85bc61, 1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0, bb4da45766d16503821f167054db76b735d89e94, afbe73778338e6d1ac8c4486fbdf33f0cc1f2624, 6.7
Linux/Linuxgeneric	6.7	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 83f0c973cffb184d019390ffdb5d31de5c85bc61 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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 patch.

Quoted source text, attributed separately from HOL analysis.