CVE-2026-3229 — Heap-based Buffer Overflow in Wolfssl

CWE-122 — Heap-based Buffer Overflow6 documents6 sources
Severity
1.2LOWNVD
EPSS
0.0%
top 97.97%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Wofssl WolfsslWolfsslDebian Wolfssl+2 more
Timeline
PublishedMar 19

Description

An integer overflow vulnerability existed in the static function wolfssl_add_to_chain, that caused heap corruption when certificate data was written out of bounds of an insufficiently sized certificate buffer. wolfssl_add_to_chain is called by these API: wolfSSL_CTX_add_extra_chain_cert, wolfSSL_CTX_add1_chain_cert, wolfSSL_add0_chain_cert. These API are enabled for 3rd party compatibility features: enable-opensslall, enable-opensslextra, enable-lighty, enable-stunnel, enable-nginx, enable-hapro…

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

Affected Packages6 packages

▶CVEListV5wofssl/wolfssl< 5.9.0
▶debiandebian/wolfssl< wolfssl 5.9.0-0.1 (forky)
▶NVDwolfssl/wolfssl< 5.9.0
▶Debianwolfssl/wolfssl< 5.9.0-0.1

Patches

Patch: github.com ↗

🔴Vulnerability Details

2
OSV
CVE-2026-3229: An integer overflow vulnerability existed in the static function wolfssl_add_to_chain, that caused heap corruption when certificate data was written o↗2026-03-19
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GHSA
GHSA-6p64-86qj-33gc: An integer overflow vulnerability existed in the static function wolfssl_add_to_chain, that caused heap corruption when certificate data was written o↗2026-03-19
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📋Vendor Advisories

2
Microsoft
Integer Overflow in Certificate Chain Allocation↗2026-03-10
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Debian
CVE-2026-3229: wolfssl - An integer overflow vulnerability existed in the static function wolfssl_add_to_...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-3229 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-3229 — Heap-based Buffer Overflow in Wolfssl | cvebase