CVE-2026-64600

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

0.47% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 38.4% 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

Analyzed. NVD last modified this record on 2026-08-18.

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

2026-07-23 05:46Z1 MO AGO

Last updated

2026-08-17 04:58Z18 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

d8c97e7504b618ca2d77af84e7279df7fec9126e5dbeb56e84f31c055f1b5b4a

• git.kernel.orghttps://git.kernel.org/stable/c/dc11be133efca5fe3a2fb02b016dee825cc12f18
• git.kernel.orghttps://git.kernel.org/stable/c/b8c9aa832b52680ee40d6cab0efb081f9a69df05
• git.kernel.orghttps://git.kernel.org/stable/c/50f0012da1040f69a4e788cd9aed587c9a04983f
• git.kernel.orghttps://git.kernel.org/stable/c/e705d81a7193dd19e69b8e2bad4696d78a4ea075
• git.kernel.orghttps://git.kernel.org/stable/c/206c09b04dc5469c7ff14d8aceff2d47c88078d9
• git.kernel.orghttps://git.kernel.org/stable/c/44f891bc088958399eec27f7604928694aa35581
• git.kernel.orghttps://git.kernel.org/stable/c/2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7
• cdn2.qualys.comhttps://cdn2.qualys.com/advisory/2026/07/22/RefluXFS.txt
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/07/22/14
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/07/22/18
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/07/22/19
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/07/31/3
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/03/4
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/03/8