{"id":"JLSEC-2026-593","details":"An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in `yasm_expr__copy_except()` in `libyasm/expr.c`.","modified":"2026-07-25T18:23:52.404556950Z","published":"2026-06-08T13:43:52.905Z","upstream":["CVE-2021-33463"],"database_specific":{"sources":[{"url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-33463","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33463","database_specific":{"status":"Modified"},"id":"CVE-2021-33463","imported":"2026-07-17T22:12:30.903Z","modified":"2026-06-17T03:54:35.833Z","published":"2022-07-26T13:15:09.687Z"}],"license":"CC-BY-4.0"},"references":[{"type":"WEB","url":"https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d"},{"type":"WEB","url":"https://github.com/yasm/yasm/issues/174"}],"affected":[{"package":{"name":"YASM_jll","ecosystem":"Julia","purl":"pkg:julia/YASM_jll?uuid=997772c2-56d0-5ccd-9329-3f55f14e5768"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-593.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}