{"id":"AZL-84842","summary":"CVE-2026-34001 affecting package xorg-x11-server-Xwayland for versions less than 24.1.6-4","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":"2026-08-28T17:48:03.854281228Z","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-Xwayland","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/xorg-x11-server-Xwayland"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"24.1.6-4"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-84842.json"}}],"schema_version":"1.9.0"}