CVE-2022-23990

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

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

4.7% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-25)

CWE

CWE-190

Published

2022-01-26

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• fedoraproject:fedora
• libexpat_project:libexpat
• oracle:communications_metasolv_solution
• siemens:sinema_remote_connect_server
• tenable:nessus

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
• https://github.com/libexpat/libexpat/pull/551
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/34NXVL2RZC2YZRV74ZQ3RNFB7WCEUP7D/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7FF2UH7MPXKTADYSJUAHI2Y5UHBSHUH/
• https://security.gentoo.org/glsa/202209-24

Check your stackJSON