CVE-2026-63865

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

0.13% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 2.7% of scored records. A rank, not a probability.

NVD base score

8.8 (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:C/C:H/I:H/A:H

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-07-27.

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

2026-07-19 14:04Z1 MO AGO

Last updated

2026-08-05 12:36Z1 MO AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

• CWE-663Use of a Non-reentrant Function in a Concurrent ContextBase

Data version

5.2

Document digest

4188fe910dcd154945af631b2a56392896c90c3a98861f8dc4e048530a0d9c8c

• git.kernel.orghttps://git.kernel.org/stable/c/452a927cddcd67478d030e646f41cb904a93156f
• git.kernel.orghttps://git.kernel.org/stable/c/f0fc2a9828171205244a28013f02889f50b71c9f
• git.kernel.orghttps://git.kernel.org/stable/c/26b380a3ca0b605fd8860995ed6a208f276dd316
• git.kernel.orghttps://git.kernel.org/stable/c/0d918263c9bfc86078edb2e2f7302a0c6ce42b7c
• git.kernel.orghttps://git.kernel.org/stable/c/281f2a214565a5cbf8b7355a65738d80bd19b8c5
• git.kernel.orghttps://git.kernel.org/stable/c/989f1b93907de1753a814996222da375f07e579b
• git.kernel.orghttps://git.kernel.org/stable/c/beaf0e96b1da74549a6cabd040f9667d83b2e97e