CVE-2026-63844

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

0.14% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 3.8% 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

Low. 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 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-1287Improper Validation of Specified Type of InputBase

Data version

5.2

Document digest

3a4b6a98aa4ce1ecbeca6b13bd86eecec40ffac5d6e6e5ac647addabd1f516cf

• git.kernel.orghttps://git.kernel.org/stable/c/b884ff67d62ef514eee9d5f605c03101c8b6bc98
• git.kernel.orghttps://git.kernel.org/stable/c/d6bd2a5fd611ec9c8a2411f084cff2435c709608
• git.kernel.orghttps://git.kernel.org/stable/c/8549b3933038e68dc61cb934b9a54223dd244a78
• git.kernel.orghttps://git.kernel.org/stable/c/249fa7549736de1c8e327d7ca6b32fa148a40bd6
• git.kernel.orghttps://git.kernel.org/stable/c/83e37c0987ca92f9e87789b46dd311dcf5a4a6c8