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CVE-2026-93524 is a heap out-of-bounds read vulnerability in the XKB SetMap handling of X.Org Server and Xwayland. A key-width/action-count desynchronization leaves the key symbol map width inconsistent with a shorter action allocation. A subsequent XkbGetMap request reads XkbKeyNumActions() entries derived from the wider key symbol map, exceeding the allocated action buffer. The overread bytes are copied into the GetMap reply and returned to the requesting client. The vulnerability affects releases preceding the fixes in xorg-server 21.1.25 and Xwayland 24.1.14.
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12 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 bounded heap information disclosure in X.Org Server's XKB request handling. An incorrect loop index in CheckKeySyms() allows stale key-width validation, producing a mismatch between the key's width and its allocated actions. A subsequent XkbGetMap request returns bytes read beyond the action allocation. The listed CVSS v3.1 score is 3.3 (Low), with local access, low privileges, no user interaction, and confidentiality impact only. An upstream fix is available in xorg-server 21.1.25, while the listed affected Amazon Linux packages remain pending fixes.
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A vulnerability affecting outdated xorg-server packages on Slackware Linux 15.0 and -current.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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.