{"id":"CVE-2026-93517","title":"X.Org Server GLX RenderLarge Heap Buffer Overflow","summary":"A heap buffer overflow in handling GLX\nRenderLarge request where dataBytes exceeds cmdlen in X.org X server before 21.1.25 and XWayland before 24.1.14 that could be be triggered by an authenticated X client could cause crashes or code ex…","severity":"high","cvss":8.5,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-122"],"vendor":"x.orgg","product":"xorg-x11-server","affected":["xorg-x11-server < 21.1.25","xwayland < 24.1.14"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-11-05T18:29:53.620632Z"},"published":"2026-10-28","updated":"2026-11-05","sourceUpdated":"2026-11-05T18:30:21.407Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93517","references":[{"url":"https://gitlab.freedesktop.org/xorg/xserver/-/commit/2abe4632d793314d3d5f28c19583fb76019f5ce4"}],"tags":["cve.org"],"epss":0.00193,"epssPercentile":0.08989,"ingestedAt":"2026-10-28T14:12:18.563Z","slug":"CVE-2026-93517","body":"## Overview\n\nA heap buffer overflow in handling GLX\nRenderLarge request where dataBytes exceeds cmdlen in X.org X server before 21.1.25 and XWayland before 24.1.14 that could be be triggered by an authenticated X client could cause crashes or code execution in X server context.\n\n## Affected\n\n- `xorg-x11-server < 21.1.25`\n- `xwayland < 24.1.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":46.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}