SB20260515105 - Improper access control in Linux kernel ptrace_may_access()

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Main Vulnerability Database SB20260515105

SB20260515105 - Improper access control in Linux kernel ptrace_may_access()

Published: May 15, 2026 Updated: June 15, 2026

Security Bulletin ID SB20260515105
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2026-46333)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Clear


The vulnerability allows a local privileged user to disclose sensitive information.

The vulnerability exists due to improper access control in ptrace_may_access() when checking dumpability for tasks without an associated mm pointer. A local privileged user can inspect kernel thread details to disclose sensitive information.

The issue affects cases involving threads that no longer have a VM or never had one, such as kernel threads.


Remediation

Install update from vendor's website.

References