CVE-2026-31638

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

0.44% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 36.5% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

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

2026-04-24 14:44Z4 MO AGO

Last updated

2026-08-05 12:24Z1 MO AGO

Reserved

2026-03-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

• CWE-476NULL Pointer DereferenceBase
• CWE-911Improper Update of Reference CountBase

Data version

5.2

Document digest

e8513437ae88a393949d733d8a74f1daa6317591ee831fd24126affc6094fc84

• git.kernel.orghttps://git.kernel.org/stable/c/b8f66447448d6c305a51413a67ec8ed26aa7d1dd
• git.kernel.orghttps://git.kernel.org/stable/c/0c156aff8a2d4fa0d61db7837641975cf0e5452d
• git.kernel.orghttps://git.kernel.org/stable/c/8299ca146489664e3c0c90a3b8900d8335b1ede4
• git.kernel.orghttps://git.kernel.org/stable/c/9fb09861e2b8d1abfe2efaf260c9f1d30080ea38
• git.kernel.orghttps://git.kernel.org/stable/c/6331f1b24a3e85465f6454e003a3e6c22005a5c5