{"id":"CVE-2018-15859","details":"Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because lookup failures are mishandled.","modified":"2026-07-08T17:15:47.285382Z","published":"2018-08-25T21:29:02.170Z","related":["SUSE-SU-2018:3685-1","SUSE-SU-2024:0037-1","SUSE-SU-2025:4407-1","SUSE-SU-2025:4426-1","SUSE-SU-2026:20186-1","openSUSE-SU-2025:15815-1","openSUSE-SU-2026:20123-1"],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:a:xkbcommon:xkbcommon:*:*:*:*:*:*:*:*"],"vendor_product":"xkbcommon:xkbcommon","extracted_events":[{"last_affected":"0.8.1"}],"source":"CPE_RANGE"},{"cpes":["cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"],"vendor_product":"canonical:ubuntu_linux","extracted_events":[{"introduced":"14.04"},{"last_affected":"14.04"},{"introduced":"16.04"},{"last_affected":"16.04"},{"introduced":"18.04"},{"last_affected":"18.04"}],"source":"CPE_STRING"}]},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2079"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201810-05"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3786-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3786-2/"},{"type":"FIX","url":"https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634"},{"type":"FIX","url":"https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/xkbcommon/libxkbcommon","events":[{"introduced":"0"},{"last_affected":"87046f56efc89d3b0771df9b4fefcda39ade3dd1"},{"fixed":"bb4909d2d8fa6b08155e449986a478101e2b2634"}],"database_specific":{"cpe":"cpe:2.3:a:xkbcommon:libxkbcommon:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"0.8.1"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["xkbcommon-0.8.1","xkbcommon-0.8.0","xkbcommon-0.7.2","xkbcommon-0.7.1","xkbcommon-0.7.0","xkbcommon-0.6.1","xkbcommon-0.6.0","xkbcommon-0.5.0","xkbcommon-0.4.3","xkbcommon-0.4.2","xkbcommon-0.4.1","xkbcommon-0.4.0","xkbcommon-0.3.2","xkbcommon-0.3.1","xkbcommon-0.3.0","xkbcommon-0.2.0"],"database_specific":{"vanir_signatures":[{"signature_type":"Function","deprecated":false,"id":"CVE-2018-15859-2f44810f","target":{"function":"ExprResolveLhs","file":"src/xkbcomp/expr.c"},"source":"https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634","signature_version":"v1","digest":{"function_hash":"43341503883219008790151130644987806371","length":787}},{"signature_type":"Line","deprecated":false,"id":"CVE-2018-15859-f8fabfcf","target":{"file":"src/xkbcomp/expr.c"},"source":"https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634","signature_version":"v1","digest":{"line_hashes":["303975513241189271169043459495378179633","57047408033659113269292648207627675083","137636030080933030529451911402325404101","198377673848364634708357946280879810418","39654489695989217364076106125130784526","1622333952790506483098321717139240657","217681883777450005324145042871811942865","134258757998295990486982799137584684993"],"threshold":0.9}}],"vanir_signatures_modified":"2026-07-08T17:15:47Z","source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-15859.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}