What’s Vulnerable › Vulnerabilities

CVE-2024-45491

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-30 · updated 2026-06-17
• Weakness: CWE-190

Description

An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).

Affected products

• libexpat project libexpat: before 2.6.3 — fixed in 2.6.3

How to fix

Upgrade to a fixed version: libexpat project libexpat 2.6.3. Check the vendor advisory for mitigations.

References

• https://github.com/libexpat/libexpat/issues/888
• https://github.com/libexpat/libexpat/pull/891
• https://lists.debian.org/debian-lts-announce/2024/09/msg00036.html
• https://security.netapp.com/advisory/ntap-20241018-0003/
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html
• https://cert-portal.siemens.com/productcert/html/ssa-613116.html

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