SB20260509106 - Always-Incorrect Control Flow Implementation in Linux kernel kexec_load_purgatory()

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Main Vulnerability Database SB20260509106

SB20260509106 - Always-Incorrect Control Flow Implementation in Linux kernel kexec_load_purgatory()

Published: May 9, 2026

Security Bulletin ID SB20260509106
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-43289)

CWE-ID: CWE-670 - Always-Incorrect Control Flow Implementation

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


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of overlapping executable sections in kexec_load_purgatory() when loading a purgatory object. A local user can supply a purgatory object with multiple executable sections that overlap in sh_addr to cause a denial of service.

The issue can trigger a kernel WARN during kexec_file_load.


Remediation

Install update from vendor's website.

References