DEBIAN-CVE-2026-22995

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Source
https://security-tracker.debian.org/tracker/CVE-2026-22995
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-22995.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-22995
Upstream
Published
2026-01-23T16:15:55.603Z
Modified
2026-02-13T04:24:59.110041Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved: ublk: fix use-after-free in ublkpartitionscanwork A race condition exists between the async partition scan work and device teardown that can lead to a use-after-free of ub->ubdisk: 1. ublkctrlstartdev() schedules partitionscanwork after adddisk() 2. ublkstopdev() calls ublkstopdevunlocked() which does: - delgendisk(ub->ubdisk) - ublkdetachdisk() sets ub->ubdisk = NULL - putdisk() which may free the disk 3. The worker ublkpartitionscanwork() then dereferences ub->ubdisk leading to UAF Fix this by using ublkgetdisk()/ublkputdisk() in the worker to hold a reference to the disk during the partition scan. The spinlock in ublkgetdisk() synchronizes with ublkdetachdisk() ensuring the worker either gets a valid reference or sees NULL and exits early. Also change flushwork() to cancelworksync() to avoid running the partition scan work unnecessarily when the disk is already detached.

References

Affected packages

Debian:14 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.18.8-1

Affected versions

6.*
6.12.38-1
6.12.41-1
6.12.43-1~bpo12+1
6.12.43-1
6.12.48-1
6.12.57-1~bpo12+1
6.12.57-1
6.12.63-1~bpo12+1
6.12.63-1
6.12.69-1~bpo12+1
6.12.69-1
6.13~rc6-1~exp1
6.13~rc7-1~exp1
6.13.2-1~exp1
6.13.3-1~exp1
6.13.4-1~exp1
6.13.5-1~exp1
6.13.6-1~exp1
6.13.7-1~exp1
6.13.8-1~exp1
6.13.9-1~exp1
6.13.10-1~exp1
6.13.11-1~exp1
6.14.3-1~exp1
6.14.5-1~exp1
6.14.6-1~exp1
6.15~rc7-1~exp1
6.15-1~exp1
6.15.1-1~exp1
6.15.2-1~exp1
6.15.3-1~exp1
6.15.4-1~exp1
6.15.5-1~exp1
6.15.6-1~exp1
6.16~rc7-1~exp1
6.16-1~exp1
6.16.1-1~exp1
6.16.3-1~bpo13+1
6.16.3-1
6.16.5-1
6.16.6-1
6.16.7-1
6.16.8-1
6.16.9-1
6.16.10-1
6.16.11-1
6.16.12-1~bpo13+1
6.16.12-1
6.16.12-2
6.17.2-1~exp1
6.17.5-1~exp1
6.17.6-1
6.17.7-1
6.17.7-2
6.17.8-1~bpo13+1
6.17.8-1
6.17.9-1
6.17.10-1
6.17.11-1
6.17.12-1
6.17.13-1~bpo13+1
6.17.13-1
6.18~rc4-1~exp1
6.18~rc4-1~exp2
6.18~rc5-1~exp1
6.18~rc6-1~exp1
6.18~rc7-1~exp1
6.18.1-1~exp1
6.18.2-1~exp1
6.18.3-1
6.18.5-1~bpo13+1
6.18.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-22995.json"