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JLSEC-2025-42 High 8.8

In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function...

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JLSEC Published
Modified
Severity
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Packages
Expat_jll < 2.4.4+0
Upstream
CVE-2021-45960

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).

References