CVE-2025-40257

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

0.46% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 38.4% 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

Deferred. 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

2025-12-04 16:08Z9 MO AGO

Last updated

2026-08-05 12:08Z1 MO AGO

Reserved

2025-04-16

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-366Race Condition within a ThreadBase

Data version

5.2

Document digest

19c5015e5bf6f201209d45367c3ceda39976932cb0e1e340a01f898d90c0331a

• git.kernel.orghttps://git.kernel.org/stable/c/9be29f8e7ce4e147e56caac2c3a0ce3573cf9c17
• git.kernel.orghttps://git.kernel.org/stable/c/e2d1ad207174a7cd7903dd27a00db4b2dfa6c64b
• git.kernel.orghttps://git.kernel.org/stable/c/385ddc0f008f24d1e7d03be998b3a98a37bd29ff
• git.kernel.orghttps://git.kernel.org/stable/c/c602cc344b4b8d41515fec3ffa98457ac963ee12
• git.kernel.orghttps://git.kernel.org/stable/c/6d3275d4ca62e2c02e1b7e8cd32db59df91c14b7
• git.kernel.orghttps://git.kernel.org/stable/c/bbbd75346c8e6490b19c2ba90f38ea66ccf352b2
• git.kernel.orghttps://git.kernel.org/stable/c/426358d9be7ce3518966422f87b96f1bad27295f
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-253495.html