SB2026102406 - Reachable assertion in Linux kernel include asm

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Main Vulnerability Database SB2026102406

SB2026102406 - Reachable assertion in Linux kernel include asm

Published: October 24, 2026

Security Bulletin ID SB2026102406
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) Reachable assertion (CVE-ID: CVE-2026-98923)

CWE-ID: CWE-617 - Reachable Assertion

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to trigger a spurious kernel warning.

The vulnerability exists due to a reachable warning assertion in the arm64 ioremap_prot() function when processing valid user mappings whose protection values lack PTE_USER. A local privileged user can map a stack-top page through /dev/mem with PROT_NONE and then read that process's cmdline entry in /proc to trigger WARN_ON_ONCE() through generic_access_phys().


Remediation

Install update from vendor's website.

References