CVE-2025-39877

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

0.15% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 4.4% 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

Analyzed. NVD last modified this record on 2026-06-17.

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

2025-09-23 06:00Z11 MO AGO

Last updated

2026-05-11 21:38Z3 MO AGO

Reserved

2025-04-16

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-416Use After FreeVariant
• CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class

Data version

5.2

Document digest

abc7119dda3398e15d3f63484fc42bd8f7ac7d0f95329b86c2e8e57f799808db

• git.kernel.orghttps://git.kernel.org/stable/c/3858c44341ad49dc7544b19cc9f9ecffaa7cc50e
• git.kernel.orghttps://git.kernel.org/stable/c/60d7a3d2b985a395318faa1d88da6915fad11c19
• git.kernel.orghttps://git.kernel.org/stable/c/26d29b2ac87a2989071755f9828ebf839b560d4c
• git.kernel.orghttps://git.kernel.org/stable/c/4e87f461d61959647464a94d11ae15c011be58ce
• git.kernel.orghttps://git.kernel.org/stable/c/3260a3f0828e06f5f13fac69fb1999a6d60d9cff
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/10/msg00008.html