CVE-2026-63971

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

0.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 6.6% 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

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 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-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase

Data version

5.2

Document digest

0a59b5fa91a528ec7bdec518eecad5ec439994c7da98a48dc67767692a9cef7d

• git.kernel.orghttps://git.kernel.org/stable/c/0e0d5bc76fd4267a71334fcc8f1a5fbcf997845d
• git.kernel.orghttps://git.kernel.org/stable/c/bcfeac79af740735ace44008b4a11b8e5add20f5
• git.kernel.orghttps://git.kernel.org/stable/c/8e9b56051d24540cfbf39194618708c4a7633549
• git.kernel.orghttps://git.kernel.org/stable/c/634a9af8a26a84d8b0d7b3b643204b344b42d9fb
• git.kernel.orghttps://git.kernel.org/stable/c/7d2038d4b80166f7bead8d07eba3b97405816c21
• git.kernel.orghttps://git.kernel.org/stable/c/68667ee4c7dadf7f63167234e2a1af09b3f7874e
• git.kernel.orghttps://git.kernel.org/stable/c/6140cfa721451fa6e18e134e709703c2bf34d0fb
• git.kernel.orghttps://git.kernel.org/stable/c/f14fe6395a8b3d961a61e138ad7b36ba3626dd4e