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CVE-2026-93520 is a heap out-of-bounds write vulnerability in the XKB ChangeKeycodeRange functionality of X.Org Server and Xwayland. The vulnerability results from an incomplete earlier fix and allows an authenticated X client to trigger heap memory corruption. It affects releases preceding the security fixes in xorg-server 21.1.25 and Xwayland 24.1.14. The precise triggering input and vulnerability-specific consequences beyond the out-of-bounds write are not established.
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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 critical vulnerability affecting xorg-server packages on Slackware Linux 15.0 and -current. The displayed scoring indicates network accessibility, low attack complexity, no required privileges or user interaction, and high confidentiality, integrity, and availability impacts. The underlying flaw is not described. Updated packages are available.
A heap out-of-bounds write in XKB ChangeKeycodeRange, 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.