CVE-2026-64438

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

0.14% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 3.4% of scored records. A rank, not a probability.

NVD base score

8.8 (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:C/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-09-03.

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

2026-07-25 08:51Z1 MO AGO

Last updated

2026-08-17 04:55Z18 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weaknesses

• CWE-416Use After FreeVariant
• CWE-825Expired Pointer DereferenceBase

Data version

5.2

Document digest

8c3b06f8c663fc4a0f7bc48210650626957191d73cfe19ffd7a9b514bf2b9f71

• git.kernel.orghttps://git.kernel.org/stable/c/218c2836b3987f3fa1d9eac505462cded0821e4c
• git.kernel.orghttps://git.kernel.org/stable/c/446b4d77599cf1a168573f7fb32a4a6aa4f09219
• git.kernel.orghttps://git.kernel.org/stable/c/5d916c1eae1933511a69bffe243b4ee5d7da399c
• git.kernel.orghttps://git.kernel.org/stable/c/f344a369d0380d54c8d6c8d24734a78dd5a89817
• git.kernel.orghttps://git.kernel.org/stable/c/51144032248cc4ea22917370565650670b8b4e9b
• git.kernel.orghttps://git.kernel.org/stable/c/49cd5ac6de8de39a14ead609bb552d372d5602cd
• git.kernel.orghttps://git.kernel.org/stable/c/6e92b28cd74fa433658efeadf21b9d4b01023d7d
• git.kernel.orghttps://git.kernel.org/stable/c/277281c10c63791067d24d421f7c43a15faa9096