UBUNTU-CVE-2026-3849

Stack Buffer Overflow in wcHpkeLabeledExtract via Oversized ECH Config. A vulnerability existed in wolfSSL 5.8.4 ECH Encrypted Client Hello support, where a maliciously crafted ECH config could cause a stack buffer overflow on the client side, leading to potential remote execution and client...

CVE-2026-3849

Stack Buffer Overflow in wcHpkeLabeledExtract via Oversized ECH Config. A vulnerability existed in wolfSSL 5.8.4 ECH Encrypted Client Hello support, where a maliciously crafted ECH config could cause a stack buffer overflow on the client side, leading to potential remote execution and client...

CVE-2026-3547

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 HAVEALPN / --enable-alpn. A crafted ALPN protocol list could trigger an out-of-bounds read, leading to a potential process crash...

CVE-2026-3549

CVE-2026-3549 describes a heap overflow in TLS 1.3 ECH parsing due to an integer underflow while calculating a buffer length in the ECH extension parsing logic. The issue can cause writes beyond allocated buffers. Public sources consistently reference wolfSSL and note that ECH is off by default; ...

Integer Underflow (Wrap or Wraparound)

Overview Affected versions of this package are vulnerable to Integer Underflow Wrap or Wraparound via the sslDecodePacket process. An attacker can cause a heap buffer overflow and application crash by injecting a malformed TLS Application Data record that is shorter than the required explicit IV...

EUVD-2026-13150

Two buffer overflow vulnerabilities existed in the wolfSSL CRL parser when parsing CRL numbers: a heap-based buffer overflow could occur when improperly storing the CRL number as a hexadecimal string, and a stack-based overflow for sufficiently sized CRL numbers. With appropriately crafted CRLs,...

DEBIAN-CVE-2026-2646

A heap-buffer-overflow vulnerability exists in wolfSSL's wolfSSLd2iSSLSESSION function. When deserializing session data with SESSIONCERTS enabled, certificate and session id lengths are read from an untrusted input without bounds validation, allowing an attacker to overflow fixed-size buffers and...

CVE-2026-2646 Heap buffer overflow in session parsing with wolfSSL_d2i_SSL_SESSION() function

A heap-buffer-overflow vulnerability exists in wolfSSL's wolfSSLd2iSSLSESSION function. When deserializing session data with SESSIONCERTS enabled, certificate and session id lengths are read from an untrusted input without bounds validation, allowing an attacker to overflow fixed-size buffers and...

CVE-2026-2646 Heap buffer overflow in session parsing with wolfSSL_d2i_SSL_SESSION() function

A heap-buffer-overflow vulnerability exists in wolfSSL's wolfSSLd2iSSLSESSION function. When deserializing session data with SESSIONCERTS enabled, certificate and session id lengths are read from an untrusted input without bounds validation, allowing an attacker to overflow fixed-size buffers and...

CVE-2026-2646

A heap-buffer-overflow vulnerability exists in wolfSSL's wolfSSLd2iSSLSESSION function. When deserializing session data with SESSIONCERTS enabled, certificate and session id lengths are read from an untrusted input without bounds validation, allowing an attacker to overflow fixed-size buffers and...

CVE-2026-0819 Stack buffer overflow in PKCS7 SignedData encoding with custom signed attributes

A stack buffer overflow vulnerability exists in wolfSSL's PKCS7 SignedData encoding functionality. In wcPKCS7BuildSignedAttributes, when adding custom signed attributes, the code passes an incorrect capacity value esd-signedAttribsCount to EncodeAttributes instead of the remaining available space...

wolfSSL 安全漏洞

wolfSSL CyaSSL is a small, portable embedded SSL programming library developed by the US-based wolfSSL company, designed for developers working with embedded systems. There is a security vulnerability in wolfSSL, which stems from a heap-based buffer overflow in the KCAPI ECC code path of...

PT-2026-26376

Name of the Vulnerable Software and Affected Versions wolfSSL versions 5.8.4 and earlier Description An out-of-bounds heap read issue exists in the wc PKCS7 DecodeEnvelopedData function when processing crafted CMS EnvelopedData messages containing zero-length encrypted content. This issue could...

wolfSSL 安全漏洞

wolfSSL CyaSSL is a small, portable embedded SSL programming library developed by the US company wolfSSL, aimed at developers working with embedded systems. Version 5.8.4 of wolfSSL contains a security vulnerability. This vulnerability stems from the lack of a software implementation for 64-bit...

PT-2026-26322

A heap-buffer-overflow vulnerability exists in wolfSSL's wolfSSL d2i SSL SESSION function. When deserializing session data with SESSION CERTS enabled, certificate and session id lengths are read from an untrusted input without bounds validation, allowing an attacker to overflow fixed-size buffers...

PYSEC-2026-2269

pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to setcookiegeneratecallback returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer. Starting in version 26.0....

CLSA-2026-1773772035 Fix CVE(s): CVE-2025-23048

SECURITY UPDATE: SNI validation issue in modssl - debian/patches/CVE-2025-23048.patch: update SNI validation to move the SSL compatibility check after strict SNI hostname verification in modules/ssl/sslenginekernel.c. - CVE-2025-23048...

openssl: OpenSSL: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing

A flaw was found in OpenSSL. When processing a specially crafted PKCS12 Personal Information Exchange Syntax Standard file, a remote attacker can exploit an out-of-bounds write vulnerability. This issue, occurring within the OPENSSLuni2utf8 function, leads to memory corruption by writing data...

openssl: OpenSSL: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing

A flaw was found in OpenSSL. When processing a specially crafted PKCS12 Personal Information Exchange Syntax Standard file, a remote attacker can exploit an out-of-bounds write vulnerability. This issue, occurring within the OPENSSLuni2utf8 function, leads to memory corruption by writing data...

EulerOS Virtualization 2.12.1 : python3 (EulerOS-SA-2026-1455)

According to the versions of the python3 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : When building nested elements using xml.dom.minidom methods such as appendChild that have a dependency on clearidcache the algorit...