DEBIAN-CVE-2022-49995

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Source
https://security-tracker.debian.org/tracker/CVE-2022-49995
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49995.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2022-49995
Upstream
Published
2025-06-18T11:15:27Z
Modified
2025-09-25T03:21:29.337969Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved: writeback: avoid use-after-free after removing device When a disk is removed, bdiunregister gets called to stop further writeback and wait for associated delayed work to complete. However, wbinodewritebackend() may schedule bandwidth estimation dwork after this has completed, which can result in the timer attempting to access the just freed bdiwriteback. Fix this by checking if the bdiwriteback is alive, similar to when scheduling writeback work. Since this requires wb->worklock, and wbinodewritebackend() may get called from interrupt, switch wb->work_lock to an irqsafe lock.

References

Affected packages

Debian:12 / 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
6.0.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / 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
6.0.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

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
6.0.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}