CVE-2026-5188

Name
CVE-2026-5188
Description
An integer underflow issue exists in wolfSSL when parsing the Subject Alternative Name (SAN) extension of X.509 certificates. A malformed certificate can specify an entry length larger than the enclosing sequence, causing the internal length counter to wrap during parsing. This results in incorrect handling of certificate data. The issue is limited to configurations using the original ASN.1 parsing implementation which is off by default.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
facts@wolfssl.com https://github.com/wolfSSL/wolfssl/pull/10024

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:* wolfssl >= None < 5.9.1

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
wolfssl edge-community 5.9.1-r0 Pavlo Dembytskyi <me@devs.boo> fixed
wolfssl edge-community 5.9.0-r0 Pavlo Dembytskyi <me@devs.boo> possibly vulnerable
wolfssl edge-community 5.8.4-r2 Pavlo Dembytskyi <me@devs.boo> possibly vulnerable
wolfssl edge-community 5.8.4-r1 None possibly vulnerable
wolfssl edge-community 5.8.2-r1 None possibly vulnerable
wolfssl edge-community 5.8.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.7.6-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.7.4-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.7.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.7.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.6.6-r0 None possibly vulnerable
wolfssl edge-community 5.6.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.5.3-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.5.1-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.5.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl edge-community 5.4.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
wolfssl 3.23-community 5.9.1-r0 Jakub Jirutka <jakub@jirutka.cz> fixed
wolfssl 3.23-community 5.8.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable