SB20261110312 - Anolis OS update for bind

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Main Vulnerability Database SB20261110312

SB20261110312 - Anolis OS update for bind

Published: November 10, 2026

Security Bulletin ID SB20261110312
CSH Severity
High
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 33% Medium 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-19630)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

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 through CPU and/or memory exhaustion.

The vulnerability exists due to resource consumption without imposed limits in the BIND resolver's inbound DNS message processing when handling messages containing structures that trigger additional processing. A remote attacker can send a specially crafted DNS message containing a maliciously large number of these structures to exhaust CPU time and/or memory and cause a denial of service.


2) Use-after-free (CVE-ID: CVE-2026-19662)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/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 use-after-free in qpcache NOQNAME proof handling when processing crafted DNSSEC responses from an attacker-controlled authoritative server. A remote attacker can send a particular sequence of crafted DNS answers to cause a denial of service.

Exploitation requires inducing the resolver to issue multiple queries for a DNSSEC-signed zone and relies on the responses arriving in a particular order and with particular timing.


3) Buffer overflow (CVE-ID: CVE-2026-94300)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service and potentially execute arbitrary code.

The vulnerability exists due to memory corruption in the GSS-TSIG message handling of ISC BIND's named process when concurrently processing replayed signed UDP messages. A remote attacker can capture and replay a previously signed UDP message while the negotiated TSIG key remains valid to cause the process to abort, and additionally send crafted queries to a zone under their control to potentially execute arbitrary code.


Remediation

Install update from vendor's website.

References