CVE-2025-21954

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

0.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 42.8% 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

Low. 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 15:46Z1 YR AGO

Last updated

2026-08-05 11:55Z2 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-401Missing Release of Memory after Effective LifetimeVariant
• CWE-1287Improper Validation of Specified Type of InputBase

Data version

5.2

Document digest

9f169b4b37329127bdac4ff84fa502e706ab4827c0a96054861c62562c649b39

• git.kernel.orghttps://git.kernel.org/stable/c/454825019d2f0c59e5174ece9e713f45ad80beff
• git.kernel.orghttps://git.kernel.org/stable/c/1c17c8ced25c5fbe424c7ad7ea11d33014a986b1
• git.kernel.orghttps://git.kernel.org/stable/c/f3600c867c99a2cc8038680ecf211089c50e7971