CVE-2026-63918

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

0.16% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 5.3% 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 2026-07-27.

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 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-911Improper Update of Reference CountBase

Data version

5.2

Document digest

47bf3065f8159d45dfefd57c3438c81e44c5a1f0d000fec556a395eea6db1c94

• git.kernel.orghttps://git.kernel.org/stable/c/ee80455feffb9cb62b5b58715cabeff495e666b2
• git.kernel.orghttps://git.kernel.org/stable/c/947013fd7c8c35dd5856557b215840098a3f67f8
• git.kernel.orghttps://git.kernel.org/stable/c/782d60a6596aee9b29c2eecfa70033899278bf65
• git.kernel.orghttps://git.kernel.org/stable/c/05f95729ca844704d15e49ce14868af4b403b32b