DEBIAN-CVE-2025-39780

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Source
https://security-tracker.debian.org/tracker/CVE-2025-39780
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-39780.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2025-39780
Upstream
Published
2025-09-11T17:15:43Z
Modified
2025-09-30T05:20:35.466554Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved: sched/ext: Fix invalid task state transitions on class switch When enabling a schedext scheduler, we may trigger invalid task state transitions, resulting in warnings like the following (which can be easily reproduced by running the hotplug selftest in a loop): schedext: Invalid task state transition 0 -> 3 for fish[770] WARNING: CPU: 18 PID: 787 at kernel/sched/ext.c:3862 scxsettaskstate+0x7c/0xc0 ... RIP: 0010:scxsettaskstate+0x7c/0xc0 ... Call Trace: <TASK> scxenabletask+0x11f/0x2e0 switchingtoscx+0x24/0x110 scxenable.isra.0+0xd14/0x13d0 bpfstructopslinkcreate+0x136/0x1a0 _sysbpf+0x1edd/0x2c30 _x64sysbpf+0x21/0x30 dosyscall64+0xbb/0x370 entrySYSCALL64afterhwframe+0x77/0x7f This happens because we skip initialization for tasks that are already dead (with their usage counter set to zero), but we don't exclude them during the scheduling class transition phase. Fix this by also skipping dead tasks during class swiching, preventing invalid task state transitions.

References

Affected packages

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
6.12.48-1

Affected versions

6.*

6.12.38-1
6.12.41-1
6.12.43-1~bpo12+1
6.12.43-1

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
6.16.5-1

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
6.13~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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}