CVE-2026-63909

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

0.63% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 47.7% 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:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-07-27.

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

2026-07-19 14:55Z1 MO AGO

Last updated

2026-08-05 12:37Z1 MO AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.1)

CNA CVSS vector

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

Weaknesses

• CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

92402cedf1647cbc6e8cf9cb48aa0b5ca0c7e0fea91609a5ad391be22d4306b1

• git.kernel.orghttps://git.kernel.org/stable/c/5500ba1d410aed1eded3eb04a76b10cfb4409334
• git.kernel.orghttps://git.kernel.org/stable/c/f6324b4240cf0b26a84c33f68a1222d727ff4af2
• git.kernel.orghttps://git.kernel.org/stable/c/0fe08c5776a798f46df1fd74b331be26bdd644d6
• git.kernel.orghttps://git.kernel.org/stable/c/d333af32e4451285e427f2d9c29de3a39f6f6d48
• git.kernel.orghttps://git.kernel.org/stable/c/94215d55b09445993929f4fc966061d61de74929
• git.kernel.orghttps://git.kernel.org/stable/c/4f7c131d2bdd7cd64b96f60d10be5ea72253f520
• git.kernel.orghttps://git.kernel.org/stable/c/0e60dafe97eca61721f3db456f97d97a80c6c8ae