CVE-2025-21999

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 13.4% of scored records. A rank, not a probability.

NVD base score

7.8 (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:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-07-14.

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

2025-04-03 07:19Z1 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-416Use After FreeVariant

Data version

5.2

Document digest

4f343a3044b0b794caa2b5b20ea632ac579c6f590b5128c0f75331e7043efa91

• git.kernel.orghttps://git.kernel.org/stable/c/eda279586e571b05dff44d48e05f8977ad05855d
• git.kernel.orghttps://git.kernel.org/stable/c/4b0b8445b6fd41e6f62ac90547a0ea9d348de3fa
• git.kernel.orghttps://git.kernel.org/stable/c/966f331403dc3ed04ff64eaf3930cf1267965e53
• git.kernel.orghttps://git.kernel.org/stable/c/63b53198aff2e4e6c5866a4ff73c7891f958ffa4
• git.kernel.orghttps://git.kernel.org/stable/c/ede3e8ac90ae106f0b29cd759aadebc1568f1308
• git.kernel.orghttps://git.kernel.org/stable/c/64dc7c68e040251d9ec6e989acb69f8f6ae4a10b
• git.kernel.orghttps://git.kernel.org/stable/c/654b33ada4ab5e926cd9c570196fefa7bec7c1df
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html