CVE-2025-21821

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

0.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 8.7% 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 2026-06-17.

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

2025-02-27 20:06Z1 YR AGO

Last updated

2026-05-11 21:07Z3 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

No CWE assigned

Data version

5.2

Document digest

7782ad8589e1371d3866eb84d6a3d2f0416a33df1cde84640aaa99b801b53101

• git.kernel.orghttps://git.kernel.org/stable/c/7bbbd311dd503653a2cc86d9226740883051dc92
• git.kernel.orghttps://git.kernel.org/stable/c/fb6a5edb60921887d7d10619fcdcbee9759552cb
• git.kernel.orghttps://git.kernel.org/stable/c/aa8e22cbedeb626f2a6bda0aea362353d627cd0a
• git.kernel.orghttps://git.kernel.org/stable/c/8392ea100f0b86c234c739c6662f39f0ccc0cefd
• git.kernel.orghttps://git.kernel.org/stable/c/e4b6b665df815b4841e71b72f06446884e8aad40
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/03/msg00028.html