{"id":"CVE-2024-31083","title":"Xorg-x11-server: use-after-free in procrenderaddglyphs","summary":"A use-after-free vulnerability was found in the ProcRenderAddGlyphs() function of Xorg servers. This issue occurs when AllocateGlyph() is called to store new glyphs sent by the client to the X server, potentially resulting in multiple en…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-416"],"vendor":"Red Hat","product":"xorg-x11-server","affected":["xorg-x11-server 21.1.12","tigervnc (all versions)","xorg-x11-server (all versions)","tigervnc (all versions)","tigervnc (all versions)","xorg-x11-server (all versions)","tigervnc (all versions)","xorg-x11-server-Xwayland (all versions)","tigervnc (all versions)","tigervnc (all versions)","tigervnc (all versions)","tigervnc (all versions)","tigervnc (all versions)","tigervnc (all versions)","tigervnc (all versions)","tigervnc (all versions)","tigervnc (all versions)","xorg-x11-server-Xwayland (all versions)","xorg-x11-server (all versions)","tigervnc (all versions)","tigervnc (all versions)","tigervnc","xorg-x11-server","xorg-x11-server-Xwayland","xorg-x11-server"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2024-04-05T18:36:25.769082Z"},"published":"2024-04-05","updated":"2026-11-04","sourceUpdated":"2026-11-04T21:12:34.722Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-31083","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:1785","label":"RHSA-2024:1785"},{"url":"https://access.redhat.com/errata/RHSA-2024:2036","label":"RHSA-2024:2036"},{"url":"https://access.redhat.com/errata/RHSA-2024:2037","label":"RHSA-2024:2037"},{"url":"https://access.redhat.com/errata/RHSA-2024:2038","label":"RHSA-2024:2038"},{"url":"https://access.redhat.com/errata/RHSA-2024:2039","label":"RHSA-2024:2039"},{"url":"https://access.redhat.com/errata/RHSA-2024:2040","label":"RHSA-2024:2040"},{"url":"https://access.redhat.com/errata/RHSA-2024:2041","label":"RHSA-2024:2041"},{"url":"https://access.redhat.com/errata/RHSA-2024:2042","label":"RHSA-2024:2042"},{"url":"https://access.redhat.com/errata/RHSA-2024:2080","label":"RHSA-2024:2080"},{"url":"https://access.redhat.com/errata/RHSA-2024:2616","label":"RHSA-2024:2616"},{"url":"https://access.redhat.com/errata/RHSA-2024:3258","label":"RHSA-2024:3258"},{"url":"https://access.redhat.com/errata/RHSA-2024:3261","label":"RHSA-2024:3261"},{"url":"https://access.redhat.com/errata/RHSA-2024:3343","label":"RHSA-2024:3343"},{"url":"https://access.redhat.com/errata/RHSA-2024:9093","label":"RHSA-2024:9093"},{"url":"https://access.redhat.com/errata/RHSA-2024:9122","label":"RHSA-2024:9122"},{"url":"https://access.redhat.com/errata/RHSA-2025:12751","label":"RHSA-2025:12751"},{"url":"https://access.redhat.com/security/cve/CVE-2024-31083"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2272000","label":"RHBZ#2272000"}],"tags":["cve.org"],"epss":0.01859,"epssPercentile":0.79283,"ingestedAt":"2026-11-05T21:36:00.607Z","slug":"CVE-2024-31083","body":"## Overview\n\nA use-after-free vulnerability was found in the ProcRenderAddGlyphs() function of Xorg servers. This issue occurs when AllocateGlyph() is called to store new glyphs sent by the client to the X server, potentially resulting in multiple entries pointing to the same non-refcounted glyphs. Consequently, ProcRenderAddGlyphs() may free a glyph, leading to a use-after-free scenario when the same glyph pointer is subsequently accessed. This flaw allows an authenticated attacker to execute arbitrary code on the system by sending a specially crafted request.\n\n## Affected\n\n- `xorg-x11-server 21.1.12`\n- `tigervnc (all versions)`\n- `xorg-x11-server (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `xorg-x11-server (all versions)`\n- `tigervnc (all versions)`\n- `xorg-x11-server-Xwayland (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `xorg-x11-server-Xwayland (all versions)`\n- `xorg-x11-server (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc (all versions)`\n- `tigervnc`\n- `xorg-x11-server`\n- `xorg-x11-server-Xwayland`\n- `xorg-x11-server`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nMitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}