SB2026082456 - Improper Initialization in Linux kernel bpf

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Main Vulnerability Database SB2026082456

SB2026082456 - Improper Initialization in Linux kernel bpf

Published: August 24, 2026

Security Bulletin ID SB2026082456
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Initialization (CVE-ID: CVE-2026-74720)

CWE-ID: CWE-665 - Improper Initialization

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to improper state management in adjust_ptr_min_max_vals() in the BPF verifier when handling commuted arithmetic involving scalar += pointer operations. A local user can execute a crafted BPF program to cause a denial of service.

The issue occurs because the destination register did not preserve the complete pointer register state, which could leave frame number and parent identity tracking inconsistent for pointer provenance.


Remediation

Install update from vendor's website.

References