{"id":"AZL-84627","summary":"CVE-2026-34001 affecting package xorg-x11-server 1.20.10-6","details":"A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.","modified":"2026-09-20T05:32:18Z","published":"2026-04-23T16:16:24Z","upstream":["CVE-2026-34001"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34001"}],"affected":[{"package":{"name":"xorg-x11-server","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/xorg-x11-server"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.20.10-6"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-84627.json"}}],"schema_version":"1.9.0"}