btrfs: restore active device pointers after failed sprout (CVE-2026-98090) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-98090

btrfs: restore active device pointers after failed sprout

Answer in brief

CVE-2026-98090 records a Unknown severity vulnerability in btrfs: restore active device pointers after failed sprout. 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	>=b7cb29e666fe79dda5dbe5f57fb7c92413bf161c <2ee5c4bc11007c51f63f0c1be5d3f07f2b404ff7 \|\| >=b7cb29e666fe79dda5dbe5f57fb7c92413bf161c <e127ac29a52134d0f4cba39d38e4b375deb3d1aa \|\| >=b7cb29e666fe79dda5dbe5f57fb7c92413bf161c <b79b4b29003690acfade8241998fc0104ef9c84c \|\| >=b7cb29e666fe79dda5dbe5f57fb7c92413bf161c <e0b54613aabeb8e9da597f23b90c6a03d0981986 \|\| a6e7e218a4d6488d56727a7d9aee1b7e78c0c485 \|\| >=5.15.11 <5.16	2ee5c4bc11007c51f63f0c1be5d3f07f2b404ff7, e127ac29a52134d0f4cba39d38e4b375deb3d1aa, b79b4b29003690acfade8241998fc0104ef9c84c, e0b54613aabeb8e9da597f23b90c6a03d0981986, 5.16
Linux/Linuxgeneric	5.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 2ee5c4bc11007c51f63f0c1be5d3f07f2b404ff7 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: restore active device pointers after failed sprout btrfs_init_new_device() switches latest_dev and possibly s_bdev from the seed device to the new sprout device before creating the first writable chunks. If chunk creation or the subsequent sprout setup fails, the error path releases the new device without switching those pointers back. btrfs_show_devname() can then dereference the freed latest_dev and crash. Restore the active device pointers to the latest seed device before removing and releasing the failed sprout device.

Quoted source text, attributed separately from HOL analysis.