CVE-2025-21796

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

0.64% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 48.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2025-02-27 02:18Z1 YR AGO

Last updated

2026-08-05 11:54Z1 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-416Use After FreeVariant

Data version

5.2

Document digest

61e9df39d41216c112b5125000ac6e09ef9b6db8b78289564fab8bf4d3828d25

• git.kernel.orghttps://git.kernel.org/stable/c/8a1737ae42c928384ab6447f6ee1a882510e85fa
• git.kernel.orghttps://git.kernel.org/stable/c/6f7cfee1a316891890c505563aa54f3476db52fd
• git.kernel.orghttps://git.kernel.org/stable/c/2e59b2b68782519560b3d6a41dd66a3d01a01cd3
• git.kernel.orghttps://git.kernel.org/stable/c/55d947315fb5f67a35e4e1d3e01bb886b9c6decf
• git.kernel.orghttps://git.kernel.org/stable/c/f8d871523142f7895f250a856f8c4a4181614510
• git.kernel.orghttps://git.kernel.org/stable/c/1fd94884174bd20beb1773990fd3b1aa877688d9
• git.kernel.orghttps://git.kernel.org/stable/c/7faf14a7b0366f153284db0ad3347c457ea70136
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-265688.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html