An update for unbound is now available for openEuler-24.03-LTS-SP4,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-4130 Final 1.0 1.0 2026-09-25 Initial 2026-09-25 2026-09-25 openEuler SA Tool V1.0 2026-09-25 unbound security update An update for unbound is now available for openEuler-24.03-LTS-SP4,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3 Unbound is a validating, recursive, caching DNS resolver. It is designed to be fast and lean and incorporates modern features based on open standards. To help increase online privacy, Unbound supports DNS-over-TLS which allows clients to encrypt their communication. Unbound is available for most platforms such as FreeBSD, OpenBSD, NetBSD, MacOS, Linux and Microsoft Windows. Unbound is a totally free, open source software under the BSD license. It doesn't make custom builds or provide specific features to paying customers only. Security Fix(es): In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in the DNSSEC validator that enables denial of service and possible remote code execution as a result of digesting DNSKEYs. A DNSKEY with an owner compression pointer to its own RDATA can overflow the digest buffer. Remote code execution is possible through attacker controlled data. An adversary can exploit the vulnerability by controlling a malicious zone and querying a vulnerable Unbound.(CVE-2026-81642) An update for unbound is now available for openEuler-24.03-LTS-SP4,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3. openEuler Security has rated this update as having a security impact of critical. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Critical unbound https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4130 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-81642 https://nvd.nist.gov/vuln/detail/CVE-2026-81642 openEuler-24.03-LTS-SP4 openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP3 python3-unbound-1.17.1-21.oe2403sp4.aarch64.rpm unbound-1.17.1-21.oe2403sp4.aarch64.rpm unbound-anchor-1.17.1-21.oe2403sp4.aarch64.rpm unbound-debuginfo-1.17.1-21.oe2403sp4.aarch64.rpm unbound-debugsource-1.17.1-21.oe2403sp4.aarch64.rpm unbound-devel-1.17.1-21.oe2403sp4.aarch64.rpm unbound-help-1.17.1-21.oe2403sp4.aarch64.rpm unbound-libs-1.17.1-21.oe2403sp4.aarch64.rpm unbound-utils-1.17.1-21.oe2403sp4.aarch64.rpm python3-unbound-1.11.0-27.oe2003sp4.aarch64.rpm unbound-1.11.0-27.oe2003sp4.aarch64.rpm unbound-debuginfo-1.11.0-27.oe2003sp4.aarch64.rpm unbound-debugsource-1.11.0-27.oe2003sp4.aarch64.rpm unbound-devel-1.11.0-27.oe2003sp4.aarch64.rpm unbound-help-1.11.0-27.oe2003sp4.aarch64.rpm unbound-libs-1.11.0-27.oe2003sp4.aarch64.rpm python3-unbound-1.13.2-27.oe2203sp4.aarch64.rpm unbound-1.13.2-27.oe2203sp4.aarch64.rpm unbound-anchor-1.13.2-27.oe2203sp4.aarch64.rpm unbound-debuginfo-1.13.2-27.oe2203sp4.aarch64.rpm unbound-debugsource-1.13.2-27.oe2203sp4.aarch64.rpm unbound-devel-1.13.2-27.oe2203sp4.aarch64.rpm unbound-help-1.13.2-27.oe2203sp4.aarch64.rpm unbound-libs-1.13.2-27.oe2203sp4.aarch64.rpm python3-unbound-1.17.1-21.oe2403sp1.aarch64.rpm unbound-1.17.1-21.oe2403sp1.aarch64.rpm unbound-anchor-1.17.1-21.oe2403sp1.aarch64.rpm unbound-debuginfo-1.17.1-21.oe2403sp1.aarch64.rpm unbound-debugsource-1.17.1-21.oe2403sp1.aarch64.rpm unbound-devel-1.17.1-21.oe2403sp1.aarch64.rpm unbound-help-1.17.1-21.oe2403sp1.aarch64.rpm unbound-libs-1.17.1-21.oe2403sp1.aarch64.rpm unbound-utils-1.17.1-21.oe2403sp1.aarch64.rpm python3-unbound-1.17.1-21.oe2403sp3.aarch64.rpm unbound-1.17.1-21.oe2403sp3.aarch64.rpm unbound-anchor-1.17.1-21.oe2403sp3.aarch64.rpm unbound-debuginfo-1.17.1-21.oe2403sp3.aarch64.rpm unbound-debugsource-1.17.1-21.oe2403sp3.aarch64.rpm unbound-devel-1.17.1-21.oe2403sp3.aarch64.rpm unbound-help-1.17.1-21.oe2403sp3.aarch64.rpm unbound-libs-1.17.1-21.oe2403sp3.aarch64.rpm unbound-utils-1.17.1-21.oe2403sp3.aarch64.rpm python3-unbound-1.17.1-21.oe2403sp4.x86_64.rpm unbound-1.17.1-21.oe2403sp4.x86_64.rpm unbound-anchor-1.17.1-21.oe2403sp4.x86_64.rpm unbound-debuginfo-1.17.1-21.oe2403sp4.x86_64.rpm unbound-debugsource-1.17.1-21.oe2403sp4.x86_64.rpm unbound-devel-1.17.1-21.oe2403sp4.x86_64.rpm unbound-help-1.17.1-21.oe2403sp4.x86_64.rpm unbound-libs-1.17.1-21.oe2403sp4.x86_64.rpm unbound-utils-1.17.1-21.oe2403sp4.x86_64.rpm python3-unbound-1.11.0-27.oe2003sp4.x86_64.rpm unbound-1.11.0-27.oe2003sp4.x86_64.rpm unbound-debuginfo-1.11.0-27.oe2003sp4.x86_64.rpm unbound-debugsource-1.11.0-27.oe2003sp4.x86_64.rpm unbound-devel-1.11.0-27.oe2003sp4.x86_64.rpm unbound-help-1.11.0-27.oe2003sp4.x86_64.rpm unbound-libs-1.11.0-27.oe2003sp4.x86_64.rpm python3-unbound-1.13.2-27.oe2203sp4.x86_64.rpm unbound-1.13.2-27.oe2203sp4.x86_64.rpm unbound-anchor-1.13.2-27.oe2203sp4.x86_64.rpm unbound-debuginfo-1.13.2-27.oe2203sp4.x86_64.rpm unbound-debugsource-1.13.2-27.oe2203sp4.x86_64.rpm unbound-devel-1.13.2-27.oe2203sp4.x86_64.rpm unbound-help-1.13.2-27.oe2203sp4.x86_64.rpm unbound-libs-1.13.2-27.oe2203sp4.x86_64.rpm python3-unbound-1.17.1-21.oe2403sp1.x86_64.rpm unbound-1.17.1-21.oe2403sp1.x86_64.rpm unbound-anchor-1.17.1-21.oe2403sp1.x86_64.rpm unbound-debuginfo-1.17.1-21.oe2403sp1.x86_64.rpm unbound-debugsource-1.17.1-21.oe2403sp1.x86_64.rpm unbound-devel-1.17.1-21.oe2403sp1.x86_64.rpm unbound-help-1.17.1-21.oe2403sp1.x86_64.rpm unbound-libs-1.17.1-21.oe2403sp1.x86_64.rpm unbound-utils-1.17.1-21.oe2403sp1.x86_64.rpm python3-unbound-1.17.1-21.oe2403sp3.x86_64.rpm unbound-1.17.1-21.oe2403sp3.x86_64.rpm unbound-anchor-1.17.1-21.oe2403sp3.x86_64.rpm unbound-debuginfo-1.17.1-21.oe2403sp3.x86_64.rpm unbound-debugsource-1.17.1-21.oe2403sp3.x86_64.rpm unbound-devel-1.17.1-21.oe2403sp3.x86_64.rpm unbound-help-1.17.1-21.oe2403sp3.x86_64.rpm unbound-libs-1.17.1-21.oe2403sp3.x86_64.rpm unbound-utils-1.17.1-21.oe2403sp3.x86_64.rpm unbound-1.17.1-21.oe2403sp4.src.rpm unbound-1.11.0-27.oe2003sp4.src.rpm unbound-1.13.2-27.oe2203sp4.src.rpm unbound-1.17.1-21.oe2403sp1.src.rpm unbound-1.17.1-21.oe2403sp3.src.rpm In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in the DNSSEC validator that enables denial of service and possible remote code execution as a result of digesting DNSKEYs. A DNSKEY with an owner compression pointer to its own RDATA can overflow the digest buffer. Remote code execution is possible through attacker controlled data. An adversary can exploit the vulnerability by controlling a malicious zone and querying a vulnerable Unbound. 2026-09-25 CVE-2026-81642 openEuler-24.03-LTS-SP4 openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP3 Critical 9.1 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Red unbound security update 2026-09-25 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4130