Loading vulnerability…
CVE-2026-93515 is a use-after-free vulnerability in the Present extension's cross-window notification handling in X.Org Server and Xwayland. The vulnerability requires the Present and SYNC extensions, which are enabled by default. It affects releases preceding the fixes in xorg-server 21.1.25 and Xwayland 24.1.14. The precise triggering sequence and CVE-specific exploitation consequences are not established.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability affecting Fedora 44's xorg-x11-server-Xwayland package, addressed by advisory FEDORA-2026-2448dda850. The content does not describe its technical cause or individual impact.
A vulnerability affecting Alpine Linux xorg-server and related packages. The reference does not describe its technical mechanism or individual severity. Updating to version 21.1.25-r0 or later is the stated remediation.
A vulnerability affecting outdated xorg-server packages on Slackware Linux 15.0 and -current. Individual technical details are not provided. Updated packages are available, and the plugin states that no known exploits are available.
A use-after-free vulnerability in Present extension cross-window notification handling, included in the X.Org security advisory affecting FreeBSD packages. Security fixes are available in xorg-server 21.1.25 and xwayland 24.1.14.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.