CVE-2026-53256

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

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 16.3% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-07-08.

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

2026-06-25 08:39Z2 MO AGO

Last updated

2026-08-05 12:34Z1 MO AGO

Reserved

2026-06-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.0)

CNA CVSS vector

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

Weaknesses

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

Data version

5.2

Document digest

c1e34cbbe5ea04148fed34eab64f7c8d725f8fb992a107493db4323730abee0d

• git.kernel.orghttps://git.kernel.org/stable/c/f5ec76bdbeb80f75ad0be204371afffee0f8fac8
• git.kernel.orghttps://git.kernel.org/stable/c/a07d741c077d4e34b16458241a94d29039386553
• git.kernel.orghttps://git.kernel.org/stable/c/1f73f92f66251065a5f39b09a47cf05ea14d3107
• git.kernel.orghttps://git.kernel.org/stable/c/de31973ef00e5aa55496f84cf6a44bb157a34e02
• git.kernel.orghttps://git.kernel.org/stable/c/b0e33e409715c617e2a20f46f99aa5403a14dfda
• git.kernel.orghttps://git.kernel.org/stable/c/8802413ce63175fb522a2bd609fb043a3550c720
• git.kernel.orghttps://git.kernel.org/stable/c/6f4462d12133106460d7c046b95aad2491e3fddf
• git.kernel.orghttps://git.kernel.org/stable/c/43c441edacf953b39517a44f5e5e10a93618b226