CVE-2022-23990

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-01-26 · updated 2026-10-14
Weakness: CWE-190

Description

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

Affected products

Debian Linux: 10.0, 11.0
Fedoraproject Fedora: 34, 35
libexpat project libexpat: before 2.4.4 — fixed in 2.4.4
Oracle Communications Metasolv Solution: 6.3.1
Siemens SINEMA Remote Connect Server: before 3.1 — fixed in 3.1
Tenable Nessus: before 8.15.3; from 10.0.0 before 10.1.1 — fixed in 10.1.1, 8.15.3

How to fix

Upgrade to a fixed version: libexpat project libexpat 2.4.4; Siemens SINEMA Remote Connect Server 3.1; Tenable Nessus 10.1.1, 8.15.3. Check the vendor advisory for mitigations.

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
https://www.debian.org/security/2022/dsa-5073
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.tenable.com/security/tns-2022-05
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/

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