CVE-2026-63946

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

0.34% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 26.1% 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 2026-07-27.

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 14:55Z1 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

06f544e624b3e7d70288f3ea5de63250affc97d26f73a0c477ce4c1d74afb210

• git.kernel.orghttps://git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436
• git.kernel.orghttps://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568
• git.kernel.orghttps://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731
• git.kernel.orghttps://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd
• git.kernel.orghttps://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9
• git.kernel.orghttps://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878