Heap-based Buffer Overflow

Overview Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the wolfSSLd2iSSLSESSION function when deserializing session data with the SESSIONCERTS option enabled. An attacker can corrupt heap memory and potentially execute arbitrary code or cause a crash by supplyi...

EUVD-2026-13137

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...

EUVD-2026-13135

In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 wolfSSL 5.8.2 and earlier is...

EUVD-2026-13131

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...

EUVD-2026-13133

Integer underflow in wolfSSL packet sniffer = 5.8.4 allows an attacker to cause a buffer overflow in the AEAD decryption path by injecting a TLS record shorter than the explicit IV plus authentication tag into traffic inspected by sslDecodePacket. The underflow wraps a 16-bit length to a large...

CVE-2026-2645

In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 wolfSSL 5.8.2 and earlier is...

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-2026-3548

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-2026-2645

In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 wolfSSL 5.8.2 and earlier is...

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-2026-3548

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,...

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...

UBUNTU-CVE-2026-3548

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,...

UBUNTU-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...

UBUNTU-CVE-2026-2645

In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 wolfSSL 5.8.2 and earlier is...

CVE-2026-2645

In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 wolfSSL 5.8.2 and earlier is...

CVE-2026-3503

Protection mechanism failure in wolfCrypt post-quantum implementations ML-KEM and ML-DSA in wolfSSL on ARM Cortex-M microcontrollers allows a physical attacker to compromise key material and/or cryptographic outcomes via induced transient faults that corrupt or redirect seed/pointer values during...

CVE-2026-3503

Protection mechanism failure in wolfCrypt post-quantum implementations ML-KEM and ML-DSA in wolfSSL on ARM Cortex-M microcontrollers allows a physical attacker to compromise key material and/or cryptographic outcomes via induced transient faults that corrupt or redirect seed/pointer values during...

CVE-2026-3548

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,...

CVE-2026-3548

Two concrete vulnerabilities affect the wolfSSL CRL parser: heap-based and stack-based buffer overflows when parsing CRL numbers, triggered by crafted CRLs and only in builds with CRL support enabled. The issue stems from storing the CRL number as a hexadecimal string, enabling out-of-bounds writ...