CVE-2022-23990 Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function

Description

Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function.

Affected products and versions

Product	Affected versions	Fixed in
n/a	Versions not published
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5

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