CVE-2026-64440

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

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 18.5% of scored records. A rank, not a probability.

NVD base score

8.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

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

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

2026-07-25 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 8.1)

CNA CVSS vector

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

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

cfa3fb00013b843f63f6bb83deb8864834c2db2334598f60f2605df005a1d5f9

• git.kernel.orghttps://git.kernel.org/stable/c/37f642d47c3648a707df3ceb092eee1adffbfd28
• git.kernel.orghttps://git.kernel.org/stable/c/8c872b47c7fc32e95e0da1db7512388794adcd69
• git.kernel.orghttps://git.kernel.org/stable/c/bb3b942da4123b55d1cacf19d1a7d5ba15dbf83a
• git.kernel.orghttps://git.kernel.org/stable/c/918537a0fbed85aab61fa28ad75e6279070610c9
• git.kernel.orghttps://git.kernel.org/stable/c/6f91621fc45025ad3c0be796b70e6e4cee22fc69
• git.kernel.orghttps://git.kernel.org/stable/c/225b6d3fc7e99ac3d20b6c861d1e47d24e7ea31d
• git.kernel.orghttps://git.kernel.org/stable/c/f8001e1a516ba3b495728c65b61f799cbfad6bd0