{"id":"CVE-2026-93543","title":"An out-of-bounds read in libXi's XI2 class parser in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.","summary":"An out-of-bounds read in libXi's XI2 class parser in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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-2026-93543","references":[{"url":"https://gitlab.freedesktop.org/xorg/lib/libxi/-/merge_requests/23/diffs?commit_id=e2089ab748828273f916bbffd4e65b506aa50fdc","label":"meissner@suse.de"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93543.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93543"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540529"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93543"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93543"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-24T17:16:58.657195Z"},"ingestedAt":"2026-09-24T16:47:15.857Z","scores":{"nvd":7.4,"vendor":6.5},"slug":"CVE-2026-93543","body":"## Overview\n\nAn out-of-bounds read in libXi's XI2 class parser in libXi before 1.8.4 could be used by malicious X servers to crash an attached 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-2026-93543.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}