An update for krb5 is now available for openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-2257 Final 1.0 1.0 2026-05-09 Initial 2026-05-09 2026-05-09 openEuler SA Tool V1.0 2026-05-09 krb5 security update An update for krb5 is now available for openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography. Security Fix(es): In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, causing the process to terminate in parse_nego_message.(CVE-2026-40355) In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process to terminate in parse_message.(CVE-2026-40356) An update for krb5 is now available for openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS. openEuler Security has rated this update as having a security impact of medium. 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. Medium krb5 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2257 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-40355 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-40356 https://nvd.nist.gov/vuln/detail/CVE-2026-40355 https://nvd.nist.gov/vuln/detail/CVE-2026-40356 openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP3 openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS krb5-1.21.2-20.oe2403sp1.aarch64.rpm krb5-client-1.21.2-20.oe2403sp1.aarch64.rpm krb5-debuginfo-1.21.2-20.oe2403sp1.aarch64.rpm krb5-debugsource-1.21.2-20.oe2403sp1.aarch64.rpm krb5-devel-1.21.2-20.oe2403sp1.aarch64.rpm krb5-libs-1.21.2-20.oe2403sp1.aarch64.rpm krb5-server-1.21.2-20.oe2403sp1.aarch64.rpm krb5-1.21.2-20.oe2403sp3.aarch64.rpm krb5-client-1.21.2-20.oe2403sp3.aarch64.rpm krb5-debuginfo-1.21.2-20.oe2403sp3.aarch64.rpm krb5-debugsource-1.21.2-20.oe2403sp3.aarch64.rpm krb5-devel-1.21.2-20.oe2403sp3.aarch64.rpm krb5-libs-1.21.2-20.oe2403sp3.aarch64.rpm krb5-server-1.21.2-20.oe2403sp3.aarch64.rpm krb5-1.18.2-23.oe2003sp4.aarch64.rpm krb5-client-1.18.2-23.oe2003sp4.aarch64.rpm krb5-debuginfo-1.18.2-23.oe2003sp4.aarch64.rpm krb5-debugsource-1.18.2-23.oe2003sp4.aarch64.rpm krb5-devel-1.18.2-23.oe2003sp4.aarch64.rpm krb5-libs-1.18.2-23.oe2003sp4.aarch64.rpm krb5-server-1.18.2-23.oe2003sp4.aarch64.rpm krb5-1.19.2-30.oe2203sp4.aarch64.rpm krb5-client-1.19.2-30.oe2203sp4.aarch64.rpm krb5-debuginfo-1.19.2-30.oe2203sp4.aarch64.rpm krb5-debugsource-1.19.2-30.oe2203sp4.aarch64.rpm krb5-devel-1.19.2-30.oe2203sp4.aarch64.rpm krb5-libs-1.19.2-30.oe2203sp4.aarch64.rpm krb5-server-1.19.2-30.oe2203sp4.aarch64.rpm krb5-1.21.2-20.oe2403.aarch64.rpm krb5-client-1.21.2-20.oe2403.aarch64.rpm krb5-debuginfo-1.21.2-20.oe2403.aarch64.rpm krb5-debugsource-1.21.2-20.oe2403.aarch64.rpm krb5-devel-1.21.2-20.oe2403.aarch64.rpm krb5-libs-1.21.2-20.oe2403.aarch64.rpm krb5-server-1.21.2-20.oe2403.aarch64.rpm krb5-1.21.2-20.oe2403sp1.src.rpm krb5-1.21.2-20.oe2403sp3.src.rpm krb5-1.18.2-23.oe2003sp4.src.rpm krb5-1.19.2-30.oe2203sp4.src.rpm krb5-1.21.2-20.oe2403.src.rpm krb5-1.21.2-20.oe2403sp1.x86_64.rpm krb5-client-1.21.2-20.oe2403sp1.x86_64.rpm krb5-debuginfo-1.21.2-20.oe2403sp1.x86_64.rpm krb5-debugsource-1.21.2-20.oe2403sp1.x86_64.rpm krb5-devel-1.21.2-20.oe2403sp1.x86_64.rpm krb5-libs-1.21.2-20.oe2403sp1.x86_64.rpm krb5-server-1.21.2-20.oe2403sp1.x86_64.rpm krb5-1.21.2-20.oe2403sp3.x86_64.rpm krb5-client-1.21.2-20.oe2403sp3.x86_64.rpm krb5-debuginfo-1.21.2-20.oe2403sp3.x86_64.rpm krb5-debugsource-1.21.2-20.oe2403sp3.x86_64.rpm krb5-devel-1.21.2-20.oe2403sp3.x86_64.rpm krb5-libs-1.21.2-20.oe2403sp3.x86_64.rpm krb5-server-1.21.2-20.oe2403sp3.x86_64.rpm krb5-1.18.2-23.oe2003sp4.x86_64.rpm krb5-client-1.18.2-23.oe2003sp4.x86_64.rpm krb5-debuginfo-1.18.2-23.oe2003sp4.x86_64.rpm krb5-debugsource-1.18.2-23.oe2003sp4.x86_64.rpm krb5-devel-1.18.2-23.oe2003sp4.x86_64.rpm krb5-libs-1.18.2-23.oe2003sp4.x86_64.rpm krb5-server-1.18.2-23.oe2003sp4.x86_64.rpm krb5-1.19.2-30.oe2203sp4.x86_64.rpm krb5-client-1.19.2-30.oe2203sp4.x86_64.rpm krb5-debuginfo-1.19.2-30.oe2203sp4.x86_64.rpm krb5-debugsource-1.19.2-30.oe2203sp4.x86_64.rpm krb5-devel-1.19.2-30.oe2203sp4.x86_64.rpm krb5-libs-1.19.2-30.oe2203sp4.x86_64.rpm krb5-server-1.19.2-30.oe2203sp4.x86_64.rpm krb5-1.21.2-20.oe2403.x86_64.rpm krb5-client-1.21.2-20.oe2403.x86_64.rpm krb5-debuginfo-1.21.2-20.oe2403.x86_64.rpm krb5-debugsource-1.21.2-20.oe2403.x86_64.rpm krb5-devel-1.21.2-20.oe2403.x86_64.rpm krb5-libs-1.21.2-20.oe2403.x86_64.rpm krb5-server-1.21.2-20.oe2403.x86_64.rpm krb5-help-1.21.2-20.oe2403sp1.noarch.rpm krb5-help-1.21.2-20.oe2403sp3.noarch.rpm krb5-help-1.18.2-23.oe2003sp4.noarch.rpm krb5-help-1.19.2-30.oe2203sp4.noarch.rpm krb5-help-1.21.2-20.oe2403.noarch.rpm In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, causing the process to terminate in parse_nego_message. 2026-05-09 CVE-2026-40355 openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP3 openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS Medium 5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H krb5 security update 2026-05-09 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2257 In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process to terminate in parse_message. 2026-05-09 CVE-2026-40356 openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP3 openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS Medium 5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H krb5 security update 2026-05-09 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2257