AZL-89531
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-89531.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-89531
- Upstream
- Published
- 2026-06-05T12:16:38Z
- Modified
- 2026-08-30T05:24:52Z
- Summary
- CVE-2026-50257 affecting package xorg-x11-server 1.20.10-6
- Details
-
A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root.
- References