{"id":"CVE-2023-5574","title":"A use-after-free flaw was found in xorg-x11-server-Xvfb","summary":"A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped f…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416","CWE-416"],"vendor":"x.org","product":"x_server","affected":["x_server >= 1.13.0","enterprise_linux = 7.0"],"published":"2023-10-25","updated":"2026-06-23","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-5574","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:2298","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2023-5574","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2244735","label":"secalert@redhat.com"},{"url":"https://lists.x.org/archives/xorg-announce/2023-October/003430.html","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:2298","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/security/cve/CVE-2023-5574","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2244735","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.x.org/archives/xorg-announce/2023-October/003430.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20231130-0004/","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00621,"epssPercentile":0.48101,"ingestedAt":"2026-06-29T13:24:33.917Z","slug":"CVE-2023-5574","body":"## Overview\n\nA use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped from a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service.\n\n## Affected\n\n- `x_server >= 1.13.0`\n- `enterprise_linux = 7.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}