SB2026100164 - openEuler 24.03 LTS SP3 update for bind

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Main Vulnerability Database SB2026100164

SB2026100164 - openEuler 24.03 LTS SP3 update for bind

Published: October 1, 2026 Updated: October 1, 2026

Security Bulletin ID SB2026100164
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
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 3 vulnerabilities.


1) Input validation error (CVE-ID: CVE-2026-80274)

CWE-ID: CWE-20 - Improper input validation

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 validation of a NOQNAME proof in the BIND validating resolver when processing DNSSEC responses. A remote attacker can send a DNS response containing a valid wildcard answer and signed NSEC3 proof followed by an unsigned NSEC record at the same owner name to cause a denial of service.

The resolver must query a DNSSEC-signed authoritative zone.


2) Memory leak (CVE-ID: CVE-2026-81563)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

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 a failure to properly deallocate internal resources in SVCB/HTTPS AliasMode additional-data processing when processing an SVCB/HTTPS AliasMode record that references 14 or more SVCB/HTTPS ServiceMode records. A remote attacker can cause the resolver to process such records to cause a denial of service.

Repeated exploitation is required to exhaust resources.


3) Resource exhaustion (CVE-ID: CVE-2026-81736)

CWE-ID: CWE-400 - Resource exhaustion

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 inefficient resource consumption in the BIND resolver when querying the root of a cached tree of SVCB/HTTPS AliasMode records. A remote attacker can send a query for the root of the cached record tree to cause a denial of service.


Remediation

Install update from vendor's website.

References