What is CVE-2025-21955?

CVE-2025-21955 is a high-severity vulnerability in Linux. CVSS score: 8.8/10. Published 2025-04-01.

How severe is CVE-2025-21955?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Linux

CVE-2025-21955

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent connection release during oplock break notification ksmbd_work could be freed when after connection release. Increment r_count of ksmbd_conn to indicate that requests are not finished yet and to not release the connection.

EPSS: 0.005 (38.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 0626e6641f6b467447c81dd7678a69c66f7746cf, 5.15, 0
Linux Linux_kernel — versions 6.14

References

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

Frequently asked questions

What is CVE-2025-21955?: CVE-2025-21955 is a high-severity vulnerability in Linux. CVSS score: 8.8/10. Published 2025-04-01.
How severe is CVE-2025-21955?: High severity. CVSS v3 base score is 8.8 out of 10.