What is CVE-2025-39780?

CVE-2025-39780 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-09-11.

How severe is CVE-2025-39780?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2025-39780 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux

CVE-2025-39780

In the Linux kernel, the following vulnerability has been resolved: sched/ext: Fix invalid task state transitions on class switch When enabling a sched_ext scheduler, we may trigger invalid task state transitions, resulting in warnings l…

EPSS: 0.001 (3.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions a8532fac7b5d27b8d62008a89593dccb6f9786ef, 6.12, 0
Linux Linux_kernel — versions 6.17

Public proof-of-concept exploits

w4zu/Debian_

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2025-39780?: CVE-2025-39780 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-09-11.
How severe is CVE-2025-39780?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2025-39780 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.