CVE-2026-64421

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 6.5% 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

Analyzed. NVD last modified this record on 2026-09-04.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2026-07-25 08:50Z1 MO AGO

Last updated

2026-08-17 04:55Z18 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.2

Document digest

c80c7702ca269a2e30b9b801fc105ec9e77d7ad574d05f65a9cd6c28d319b870

• git.kernel.orghttps://git.kernel.org/stable/c/d22fb719654bfde6f682c9f14629f5f9534175b7
• git.kernel.orghttps://git.kernel.org/stable/c/ba2aa5d325270cd965c44458c5ff5ab555e6af51
• git.kernel.orghttps://git.kernel.org/stable/c/ef382a6baf0a95cf199fdf6bba2fd08e58b0a249
• git.kernel.orghttps://git.kernel.org/stable/c/c12a5b2261351cd3b03921ce4720332ff5184b50
• git.kernel.orghttps://git.kernel.org/stable/c/b670bf89824ede5d07d20bb9bfbafb754846081d