{"id":"JLSEC-2025-42","summary":"In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function...","details":"In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).","modified":"2026-07-25T18:23:43.173239294Z","published":"2025-10-14T15:35:41.198Z","upstream":["CVE-2021-45960"],"database_specific":{"sources":[{"html_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45960","database_specific":{"status":"Modified"},"id":"CVE-2021-45960","imported":"2026-07-17T21:01:53.748Z","modified":"2026-06-17T04:14:19.917Z","published":"2022-01-01T19:15:08.030Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-45960"}],"license":"CC-BY-4.0"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2022/01/17/3"},{"type":"WEB","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1217609"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf"},{"type":"WEB","url":"https://github.com/libexpat/libexpat/issues/531"},{"type":"WEB","url":"https://github.com/libexpat/libexpat/pull/534"},{"type":"WEB","url":"https://security.gentoo.org/glsa/202209-24"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20220121-0004/"},{"type":"WEB","url":"https://www.debian.org/security/2022/dsa-5073"},{"type":"WEB","url":"https://www.tenable.com/security/tns-2022-05"}],"affected":[{"package":{"name":"Expat_jll","ecosystem":"Julia","purl":"pkg:julia/Expat_jll?uuid=2e619515-83b5-522b-bb60-26c02a35a201"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.4.4+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2025/JLSEC-2025-42.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V2","score":"AV:N/AC:L/Au:S/C:C/I:C/A:C"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}