CVE-2026-64091

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

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 35.4% 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 2026-08-11.

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

2026-07-19 15:40Z1 MO AGO

Last updated

2026-08-05 12:39Z1 MO 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-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase

Data version

5.2

Document digest

efc62d9fb0bc097ce2991493c5db91dc3b7589a9d954c7c806dcf18e0d0bce28

• git.kernel.orghttps://git.kernel.org/stable/c/e4236bf3ec8d6bb15d0d8d825dcf9933a7d6666b
• git.kernel.orghttps://git.kernel.org/stable/c/724a8eb4155669797c96b70d70e354284ae3b5a8
• git.kernel.orghttps://git.kernel.org/stable/c/211ea59988e1cba43cb0367ad65d379b56f9c3bd
• git.kernel.orghttps://git.kernel.org/stable/c/65a1e67339aa8c95ac544b796946af388930ee23
• git.kernel.orghttps://git.kernel.org/stable/c/b4d4efd4e351593c81e9293d4b4408d244fa5ee7
• git.kernel.orghttps://git.kernel.org/stable/c/4cc85aec8d3c9ab4dc716dc9f1ed36fca16b227f
• git.kernel.orghttps://git.kernel.org/stable/c/9a9c859457bc440a55773e01ff18b1bb5bab6836
• git.kernel.orghttps://git.kernel.org/stable/c/94d27005016be15ffc638b2ecbc4d58805ad7b48