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CVE-2026-93519 is a buffer overflow in the XFixes Pointer Barrier event list in X.Org Server and Xwayland. Input_constrain_cursor() writes barrier events into a fixed-size buffer without checking bounds. With more than 100 active pointer barriers, these writes overflow a stack or heap buffer. An authenticated X client can trigger the flaw by creating the barriers through XFIXES and generating pointer motion events, for example through XTEST. The vulnerability affects releases before xorg-server 21.1.25 and Xwayland 24.1.14.
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13 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 buffer overflow in the X server's Input_constrain_cursor() function allows an authenticated X client to cause arbitrary code execution or denial of service by creating more than 100 pointer barriers and generating pointer motion events. XFIXES and XTEST are enabled by default. The advisory assigns CVSS 3.1 severity 7.8. An upstream fix is available in xorg-server 21.1.25, while the listed affected Amazon Linux packages remain pending fix.
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A vulnerability affecting outdated xorg-server packages on Slackware Linux 15.0 and -current.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.
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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.