btrfs: zoned: finish active block group cleanup if call_zone_finish() fails (CVE-2026-98081) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-98081

btrfs: zoned: finish active block group cleanup if call_zone_finish() fails

Answer in brief

CVE-2026-98081 records a Unknown severity vulnerability in btrfs: zoned: finish active block group cleanup if call_zone_finish() fails. 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	>=d70cbdda75da3f258118a558c087157e073229fb <36b9cdab44848f25879ca625275c92b007f84653 \|\| >=d70cbdda75da3f258118a558c087157e073229fb <40370f02a1ca3760f8925ffcbe76eb4d91ea758d \|\| >=d70cbdda75da3f258118a558c087157e073229fb <e1b168a53174b385e3548bfbd079513b22ac240c \|\| >=d70cbdda75da3f258118a558c087157e073229fb <a18a6b93a2843b9d103d3456bbd4b3f90282a379	36b9cdab44848f25879ca625275c92b007f84653, 40370f02a1ca3760f8925ffcbe76eb4d91ea758d, e1b168a53174b385e3548bfbd079513b22ac240c, a18a6b93a2843b9d103d3456bbd4b3f90282a379
Linux/Linuxgeneric	5.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 36b9cdab44848f25879ca625275c92b007f84653 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: zoned: finish active block group cleanup if call_zone_finish() fails do_zone_finish() clears BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE before finishing the zones. If call_zone_finish() then fails it returned early, leaving the now inactive block group on fs_info->zone_active_bgs, leaking its reference, the BTRFS_FS_NEED_ZONE_FINISH waiters are never woken, and as its alloc_offset equals the zone capacity btrfs_zone_finish_one_bg() keeps selecting it, spinning btrfs_zoned_activate_one_bg(). Fall through to the cleanup on failure too and return the error, but keep the block group read-only as its zones are left inconsistent.

Quoted source text, attributed separately from HOL analysis.