SB20260925152 - Exposure of Resource to Wrong Sphere in Linux kernel signal delivery logic handling shared siginfo data

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Main Vulnerability Database SB20260925152

SB20260925152 - Exposure of Resource to Wrong Sphere in Linux kernel signal delivery logic handling shared siginfo data

Published: September 25, 2026

Security Bulletin ID SB20260925152
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Exposure of Resource to Wrong Sphere (CVE-ID: CVE-2026-93222)

CWE-ID: CWE-668 - Exposure of resource to wrong sphere

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause signal sender identifiers to be incorrectly rewritten.

The vulnerability exists due to improper handling of shared siginfo data in the signal delivery logic when delivering group signals across namespaces. A local user can send a group signal to cause sender identifiers rewritten for one recipient to affect subsequent recipients.


Remediation

Install update from vendor's website.

References