CVE-2026-64387

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

Awaiting Analysis. NVD last modified this record on 2026-08-17.

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

2026-07-25 08:50Z1 MO AGO

Last updated

2026-08-17 04:54Z18 DAYS AGO

Reserved

2026-07-19

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-1341Multiple Releases of Same Resource or HandleBase

Data version

5.2

Document digest

304c6f79a1b72f7760574154cc159fdc74a0d7088a3e80fe7a2f473feda62d8c

• git.kernel.orghttps://git.kernel.org/stable/c/3409aedf3c81a810243da94164f6621c9d205c98
• git.kernel.orghttps://git.kernel.org/stable/c/1665f25b1dea30bf2d02e16245d203a944c9d994
• git.kernel.orghttps://git.kernel.org/stable/c/00b0fa425941438b664950a8ee65dfba2def4336
• git.kernel.orghttps://git.kernel.org/stable/c/3317a5d015fca976475aa71df224056777316fde
• git.kernel.orghttps://git.kernel.org/stable/c/9647492b5e41954be59d5157eddbcd4cdc1656f7