CVE-2026-3547
wolfSSL: out-of-bounds read (DoS) in ALPN parsing due to incomplete validation
Summary
wolfSSL: out-of-bounds read (DoS) in ALPN parsing due to incomplete validation
Original description
The description as published by the source.
Out-of-bounds read in ALPN parsing due to incomplete validation. wolfSSL 5.8.4 and earlier contained an out-of-bounds read in ALPN handling when built with ALPN enabled (HAVE_ALPN / --enable-alpn). A crafted ALPN protocol list could trigger an out-of-bounds read, leading to a potential process crash (denial of service). Note that ALPN is disabled by default, but is enabled for these 3rd party compatibility features: enable-apachehttpd, enable-bind, enable-curl, enable-haproxy, enable-hitch, enable-lighty, enable-jni, enable-nginx, enable-quic.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-3547 wolfssl
- Ubuntu UBUNTU-CVE-2026-3547 wolfssl
References
- advisory github.com
- advisory nvd.nist.gov
- patch github.com