SB20260816508 - Improper Initialization in Linux kernel kernel probes

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Main Vulnerability Database SB20260816508

SB20260816508 - Improper Initialization in Linux kernel kernel probes

Published: August 16, 2026

Security Bulletin ID SB20260816508
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-2026-72028)

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 arch/riscv/kernel/probes/rethook_trampoline.S when handling kretprobe stack access on risc-v systems. A local user can configure a kretprobe that reads a word from the stack to cause a denial of service.

The issue occurs because the original stack pointer is not preserved in the saved register state, which can leave regs->sp with an arbitrary value during stack access.


Remediation

Install update from vendor's website.

References