CVE-2026-64039

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

0.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 7.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-07-30.

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

2026-07-19 15:39Z1 MO AGO

Last updated

2026-08-05 12:38Z1 MO AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.7)

CNA CVSS vector

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

Weaknesses

• CWE-805Buffer Access with Incorrect Length ValueBase

Data version

5.2

Document digest

81d5c1b3eb819a21ee06ae3ad796ed2a2ef3e0944d590b3116ffe1685284a626

• git.kernel.orghttps://git.kernel.org/stable/c/8fb070cf95847b29ef6cb15ec2c0de2bf4704676
• git.kernel.orghttps://git.kernel.org/stable/c/cecd34e046121d788a70b5c8b4f8a88916637953
• git.kernel.orghttps://git.kernel.org/stable/c/070e40acc59ef7bedba0314f59971ba87fcc8ab0
• git.kernel.orghttps://git.kernel.org/stable/c/1ef79be774706dddcfcace0331fa7ff32a73c73e
• git.kernel.orghttps://git.kernel.org/stable/c/cdd1aaf0ee962f50810b9aef7928f2313989d55f
• git.kernel.orghttps://git.kernel.org/stable/c/0c90ececfad3fc5c4c43a75ece0e2d736ab3def1
• git.kernel.orghttps://git.kernel.org/stable/c/76824d2467feb1828b745d6add2541918d7be3da