SB2026092164 - Anolis OS update for unbound

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Main Vulnerability Database SB2026092164

SB2026092164 - Anolis OS update for unbound

Published: September 21, 2026

Security Bulletin ID SB2026092164
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2026-44621)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper access control in the libworker_alloc_cleanup function call allow list in libunbound when processing enough wrong-transaction-ID UDP replies to cross the unwanted-reply-threshold. A remote attacker can send crafted UDP replies to cause a denial of service.

Only applications using libunbound with 'unwanted-reply-threshold' set to a non-zero value are vulnerable. Unbound itself is not affected.


Remediation

Install update from vendor's website.

References