CVE-2026-89329

Summary

A flaw was found in multipathd. A local attacker with access to the multipathd UNIX control socket can exploit this vulnerability by sending valid commands and then ceasing to read replies. This action can cause the multipathd listener thread to block, leading to a Denial of Service (DoS) where legitimate Inter-Process Communication (IPC) operations may hang or time out. This issue does not result in privilege escalation, arbitrary code execution, or impact data confidentiality or integrity.

Affected Software

VendorProductVersion RangeStatus

Weaknesses

  • CWE-1322: Use of Blocking Code in Single-threaded, Non-blocking Context

Workarounds

To mitigate this issue, implement strict local access controls on systems running multipathd. This limits the ability of unprivileged users to interact with the multipathd IPC socket, thereby preventing exploitation of the world-writable control socket. Ensure that only trusted administrators have local access to the system.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References