CVE-2022-25235: expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution

Severity: Critical

CVSS Score: 9.8

xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.