CVE-2026-64221

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

0.13% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 2.7% 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 2026-08-11.

Red Hat severity

Important. 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

2026-07-24 15:23Z1 MO AGO

Last updated

2026-08-05 12:40Z1 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-416Use After FreeVariant
• CWE-825Expired Pointer DereferenceBase

Data version

5.2

Document digest

67b8f553bc5e727b02138d19b406073779e3645ba4a66d17622d51bfff89db76

• git.kernel.orghttps://git.kernel.org/stable/c/9c6f306a8140962c7284197db54b96fdb5f468d6
• git.kernel.orghttps://git.kernel.org/stable/c/3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6
• git.kernel.orghttps://git.kernel.org/stable/c/d6f422b122922d1abee907d673bcc990e5f3672d
• git.kernel.orghttps://git.kernel.org/stable/c/f2dc841d7dc9063fe9b47ced869b1271e55052ae
• git.kernel.orghttps://git.kernel.org/stable/c/1cd927002120678bd5d23c760246639caa53040e
• git.kernel.orghttps://git.kernel.org/stable/c/d7a076fb596c7b408ed6df74793a597990a6d860
• git.kernel.orghttps://git.kernel.org/stable/c/178b9b570c0f75fa7e691490520328b20d19138e
• git.kernel.orghttps://git.kernel.org/stable/c/ea6ec3343e05f7937a53eb6d7617b3abdb4abc19