CVE-2026-64539

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

0.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 2.4% 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

Received. NVD last modified this record on 2026-08-17.

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

2026-07-27 20:10Z1 MO AGO

Last updated

2026-08-17 04:57Z18 DAYS 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

No CWE assigned

Data version

5.2

Document digest

d0eeb9df44e2315b7ed7a0846149e865062b54957c78ba4da2858fb2c7b69319

• git.kernel.orghttps://git.kernel.org/stable/c/0f0b6232af56441d0a2dcb173cc4f8d8aab39014
• git.kernel.orghttps://git.kernel.org/stable/c/09301f1fdf2aef8cce34d0c4650c30e7edb1ced9
• git.kernel.orghttps://git.kernel.org/stable/c/f1b4df9c260c51726da2e86e19322825fddeefd0
• git.kernel.orghttps://git.kernel.org/stable/c/57077eeb586c42f124bc09e018449362223067b3
• git.kernel.orghttps://git.kernel.org/stable/c/6f5fb689fdf80bdd143f22a502f9eb1f3c85e286