CVE-2026-23440

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

0.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 10.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-07-24.

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

2026-04-03 15:15Z5 MO AGO

Last updated

2026-08-05 12:21Z1 MO AGO

Reserved

2026-01-13

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
• CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase

Data version

5.2

Document digest

f0cb8f667e466c59e222183e96d6a72d1d59420f916b6509eca9024d2f273d9d

• git.kernel.orghttps://git.kernel.org/stable/c/3dffc083292e6872787bd7e34b957627622f9af4
• git.kernel.orghttps://git.kernel.org/stable/c/2051c709dce92da3550040aa7949cd5a9c89b14e
• git.kernel.orghttps://git.kernel.org/stable/c/96c9c25b74686ac2de15921c9ad30c5ef13af8cd
• git.kernel.orghttps://git.kernel.org/stable/c/8d625c15471fb8780125eaef682983a96af77bdc
• git.kernel.orghttps://git.kernel.org/stable/c/beb6e2e5976a128b0cccf10d158124422210c5ef