CVE-2025-21939

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 11.1% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-07-30.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-04-01 15:41Z1 YR AGO

Last updated

2026-08-05 11:55Z1 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-476NULL Pointer DereferenceBase
• CWE-667Improper LockingClass

Data version

5.2

Document digest

9eb641cdf4035fb5a2d542117449fcc064529444de389487cab7937f159c4e56

• git.kernel.orghttps://git.kernel.org/stable/c/2a24c98f0e4cc994334598d4f3a851972064809d
• git.kernel.orghttps://git.kernel.org/stable/c/f9326f529da7298a95643c3267f1c0fdb0db55eb
• git.kernel.orghttps://git.kernel.org/stable/c/0a98219bcc961edd3388960576e4353e123b4a51