{"id":"CVE-2026-93542","title":"An out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes() in libXi before 1.8.4 could be used by malicous servers to crash the X client.","summary":"An out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes() in libXi before 1.8.4 could be used by malicous servers to crash the X client.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"vendor":"x.org","product":"libXi","affected":["libXi < 1.8.4"],"published":"2026-09-24","updated":"2026-09-24","sourceUpdated":"2026-09-24T21:00:46.893","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93542","references":[{"url":"https://gitlab.freedesktop.org/xorg/lib/libxi/-/merge_requests/23/diffs?commit_id=f499944ad595b9bd7e7571c810842244caf150aa","label":"meissner@suse.de"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93542.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93542"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540477"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93542"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93542"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-24T17:18:15.511330Z"},"ingestedAt":"2026-09-24T16:47:15.891Z","slug":"CVE-2026-93542","body":"## Overview\n\nAn out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes() in libXi before 1.8.4 could be used by malicous servers to crash the X client.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93542.json)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}