What’s Vulnerable › Vulnerabilities
CVE-2022-25235
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 5.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2022-02-16 · updated 2026-10-14
- Weakness: CWE-116
Description
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.
Affected products
- Debian Linux: 10.0, 11.0
- Fedoraproject Fedora: 34, 35
- libexpat project libexpat: before 2.4.5 — fixed in 2.4.5
- Oracle Corporation Oracle HTTP Server: 12.2.1.3.0, 12.2.1.4.0
- Oracle Corporation Oracle ZFS Storage Appliance Kit: 8.8
- Siemens SINEMA Remote Connect Server: before 3.1 — fixed in 3.1
How to fix
Upgrade to a fixed version: libexpat project libexpat 2.4.5; Siemens SINEMA Remote Connect Server 3.1. Check the vendor advisory for mitigations.
References
- http://www.openwall.com/lists/oss-security/2022/02/19/1
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
- https://github.com/libexpat/libexpat/pull/562
- https://lists.debian.org/debian-lts-announce/2022/03/msg00007.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UFRBA3UQVIQKXTBUQXDWQOVWNBKLERU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y27XO3JMKAOMQZVPS3B4MJGEAHCZF5OM/
- https://security.gentoo.org/glsa/202209-24
- https://security.netapp.com/advisory/ntap-20220303-0008/
- https://www.debian.org/security/2022/dsa-5085
- https://www.oracle.com/security-alerts/cpuapr2022.html
- http://www.openwall.com/lists/oss-security/2022/02/19/1
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Get alerted when CVE-2022-25235 or the next vulnerability affects your stack