CVE-2026-63974

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

0.32% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 24.0% 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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Awaiting Analysis. 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

2026-07-19 14:55Z1 MO AGO

Last updated

2026-08-05 12:37Z1 MO AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:A/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

4be94af4c1a5293f0077f6ae2174a933d3d6ca3df52d808e800655495d781e92

• git.kernel.orghttps://git.kernel.org/stable/c/9cebe4680bb9a72f80c6541eb24af06db7a1fbc9
• git.kernel.orghttps://git.kernel.org/stable/c/47330cc875b36a1cf7b3543cb2cf90a7c603ce0e
• git.kernel.orghttps://git.kernel.org/stable/c/60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff
• git.kernel.orghttps://git.kernel.org/stable/c/525daaea459fc215f432de1b8debbd9144bf97b0