{"id":"CVE-2026-56000","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-56000","summary":"xorg-x11-server / xwayland GLX contextTags Use-After-Free in CommonMakeCurrent()","details":"Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.","published":"2026-07-08T07:36:15.357Z","modified":"2026-08-13T11:56:58.543651939Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56000.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56000"},{"type":"ADVISORY","url":"https://www.openwall.com/lists/oss-security/2026/07/08/2"},{"type":"FIX","url":"https://gitlab.freedesktop.org/xorg/xserver/-/commit/2779affbdb4354e894f490e56f962527d6125043"},{"type":"PACKAGE","url":"https://gitlab.freedesktop.org/xorg/xserver/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-13T11:56:58.543651939Z"}}