CVE-2026-64363

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

0.22% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 11.9% 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 2026-09-04.

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 08:50Z1 MO AGO

Last updated

2026-08-17 04:54Z18 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-416Use After FreeVariant
• CWE-364Signal Handler Race ConditionBase

Data version

5.2

Document digest

f2bd2b246ea3e861cbd4f15e1d3f010e23dd434c5b3fe4f8fae76174400df84c

• git.kernel.orghttps://git.kernel.org/stable/c/89ef67359672bf4cd6921524e39f61648fe38c0f
• git.kernel.orghttps://git.kernel.org/stable/c/3d30a0bb0e79621ae921b487835c56198adfafa3
• git.kernel.orghttps://git.kernel.org/stable/c/37a52c61d4f78153c38ae1f7491dfcc8ac828dcf
• git.kernel.orghttps://git.kernel.org/stable/c/05e3decc55d1deca9410e0eb36466651fcbe57a5
• git.kernel.orghttps://git.kernel.org/stable/c/3755f6e25776b8b12ddf062f9b573f05090e4034
• git.kernel.orghttps://git.kernel.org/stable/c/b363d964ca829c1761c9f04188dfa28f90b0f2d4
• git.kernel.orghttps://git.kernel.org/stable/c/6b0838e86da88b1d3bff86f19761ff25af73eaca
• git.kernel.orghttps://git.kernel.org/stable/c/75fe87e19d8aff81eb2c64d15d244ab8da4de945