CVE-2025-39977

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

0.14% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 3.9% 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

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

2025-10-15 07:55Z10 MO AGO

Last updated

2026-08-05 12:06Z1 MO AGO

Reserved

2025-04-16

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

a65fd44147e20a37ecb6901b4764e92856a9059791982bf6d422af39296a6464

• git.kernel.orghttps://git.kernel.org/stable/c/cb5d19a61274b51b49601214a87af573b43d60fa
• git.kernel.orghttps://git.kernel.org/stable/c/348736955ed6ca6e99ca24b93b1d3fbfe352c181
• git.kernel.orghttps://git.kernel.org/stable/c/a170b9c0dde83312b8b58ccc91509c7c15711641
• git.kernel.orghttps://git.kernel.org/stable/c/d824b2dbdcfe3c390278dd9652ea526168ef6850
• git.kernel.orghttps://git.kernel.org/stable/c/b549113738e8c751b613118032a724b772aa83f2
• 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