An update for lxc is now available for 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-2026-2657 Final 1.0 1.0 2026-06-12 Initial 2026-06-12 2026-06-12 openEuler SA Tool V1.0 2026-06-12 lxc security update An update for lxc is now available for openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3 Linux Containers userspace tools Security Fix(es): lxc is a Linux container runtime. In the setuid helper lxc-user-nic, the delete path contains a logic flaw in the find_line() function that allows an unprivileged user to delete OVS-attached network interfaces belonging to other users. When lxc-user-nic delete scans its NIC database to authorize a deletion request, the interface name comparison can set the authorization flag based on a name match alone, even when the ownership, type, and link fields in that database entry belong to a different user. The vulnerable check sits after the goto next label handling, meaning it is reachable on lines where earlier ownership checks failed or were skipped. Because nothing downstream of this authorization signal re-verifies that the matched database line actually belongs to the caller, an unprivileged attacker with a valid lxc-usernet policy entry can trigger deletion of another user's OVS port on the same bridge. This is limited to multi-tenant environments using lxc-user-nic with OpenVSwitch bridges. The impact is denial of service - one tenant can repeatedly disconnect networking from containers run by another tenant on shared infrastructure. This is patched in version 7.0.0.(CVE-2026-39402) An update for lxc is now available for 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 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 lxc https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2657 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-39402 https://nvd.nist.gov/vuln/detail/CVE-2026-39402 openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP3 lxc-4.0.3-2022102419.oe2003sp4.aarch64.rpm lxc-debuginfo-4.0.3-2022102419.oe2003sp4.aarch64.rpm lxc-debugsource-4.0.3-2022102419.oe2003sp4.aarch64.rpm lxc-devel-4.0.3-2022102419.oe2003sp4.aarch64.rpm lxc-libs-4.0.3-2022102419.oe2003sp4.aarch64.rpm lxc-4.0.3-2022102428.oe2203sp4.aarch64.rpm lxc-debuginfo-4.0.3-2022102428.oe2203sp4.aarch64.rpm lxc-debugsource-4.0.3-2022102428.oe2203sp4.aarch64.rpm lxc-devel-4.0.3-2022102428.oe2203sp4.aarch64.rpm lxc-libs-4.0.3-2022102428.oe2203sp4.aarch64.rpm lxc-5.0.2-19.oe2403sp1.aarch64.rpm lxc-debuginfo-5.0.2-19.oe2403sp1.aarch64.rpm lxc-debugsource-5.0.2-19.oe2403sp1.aarch64.rpm lxc-devel-5.0.2-19.oe2403sp1.aarch64.rpm lxc-libs-5.0.2-19.oe2403sp1.aarch64.rpm lxc-5.0.2-19.oe2403sp3.aarch64.rpm lxc-debuginfo-5.0.2-19.oe2403sp3.aarch64.rpm lxc-debugsource-5.0.2-19.oe2403sp3.aarch64.rpm lxc-devel-5.0.2-19.oe2403sp3.aarch64.rpm lxc-libs-5.0.2-19.oe2403sp3.aarch64.rpm lxc-4.0.3-2022102419.oe2003sp4.src.rpm lxc-4.0.3-2022102428.oe2203sp4.src.rpm lxc-5.0.2-19.oe2403sp1.src.rpm lxc-5.0.2-19.oe2403sp3.src.rpm lxc-4.0.3-2022102419.oe2003sp4.x86_64.rpm lxc-debuginfo-4.0.3-2022102419.oe2003sp4.x86_64.rpm lxc-debugsource-4.0.3-2022102419.oe2003sp4.x86_64.rpm lxc-devel-4.0.3-2022102419.oe2003sp4.x86_64.rpm lxc-libs-4.0.3-2022102419.oe2003sp4.x86_64.rpm lxc-4.0.3-2022102428.oe2203sp4.x86_64.rpm lxc-debuginfo-4.0.3-2022102428.oe2203sp4.x86_64.rpm lxc-debugsource-4.0.3-2022102428.oe2203sp4.x86_64.rpm lxc-devel-4.0.3-2022102428.oe2203sp4.x86_64.rpm lxc-libs-4.0.3-2022102428.oe2203sp4.x86_64.rpm lxc-5.0.2-19.oe2403sp1.x86_64.rpm lxc-debuginfo-5.0.2-19.oe2403sp1.x86_64.rpm lxc-debugsource-5.0.2-19.oe2403sp1.x86_64.rpm lxc-devel-5.0.2-19.oe2403sp1.x86_64.rpm lxc-libs-5.0.2-19.oe2403sp1.x86_64.rpm lxc-5.0.2-19.oe2403sp3.x86_64.rpm lxc-debuginfo-5.0.2-19.oe2403sp3.x86_64.rpm lxc-debugsource-5.0.2-19.oe2403sp3.x86_64.rpm lxc-devel-5.0.2-19.oe2403sp3.x86_64.rpm lxc-libs-5.0.2-19.oe2403sp3.x86_64.rpm lxc-help-4.0.3-2022102419.oe2003sp4.noarch.rpm lxc-help-4.0.3-2022102428.oe2203sp4.noarch.rpm lxc-help-5.0.2-19.oe2403sp1.noarch.rpm lxc-help-5.0.2-19.oe2403sp3.noarch.rpm lxc is a Linux container runtime. In the setuid helper lxc-user-nic, the delete path contains a logic flaw in the find_line() function that allows an unprivileged user to delete OVS-attached network interfaces belonging to other users. When lxc-user-nic delete scans its NIC database to authorize a deletion request, the interface name comparison can set the authorization flag based on a name match alone, even when the ownership, type, and link fields in that database entry belong to a different user. The vulnerable check sits after the goto next label handling, meaning it is reachable on lines where earlier ownership checks failed or were skipped. Because nothing downstream of this authorization signal re-verifies that the matched database line actually belongs to the caller, an unprivileged attacker with a valid lxc-usernet policy entry can trigger deletion of another user's OVS port on the same bridge. This is limited to multi-tenant environments using lxc-user-nic with OpenVSwitch bridges. The impact is denial of service - one tenant can repeatedly disconnect networking from containers run by another tenant on shared infrastructure. This is patched in version 7.0.0. 2026-06-12 CVE-2026-39402 openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP3 Medium 6.5 AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H lxc security update 2026-06-12 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2657