CVE-2026-31609

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

0.46% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 37.7% of scored records. A rank, not a probability.

NVD base score

9.8 (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:H/I:H/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 14:42Z4 MO AGO

Last updated

2026-08-05 12:23Z1 MO AGO

Reserved

2026-03-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-415Double FreeVariant
• CWE-1341Multiple Releases of Same Resource or HandleBase

Data version

5.2

Document digest

23799a56afbca4b3d9ed27c46dc8e315bae4cca5f6b3dfe5086c6aa54791aaf4

• git.kernel.orghttps://git.kernel.org/stable/c/a9940dcbe5cb92482c04efc7341039ddf7dbf607
• git.kernel.orghttps://git.kernel.org/stable/c/22b7c1c619d808aec4cad3dc42103345e370d107
• git.kernel.orghttps://git.kernel.org/stable/c/f9a162c2bbcd0ac85bd07c5b37cf20286048b65c
• git.kernel.orghttps://git.kernel.org/stable/c/27b7c3e916218b5eb2ee350211140e961bfc49be