CVE-2026-5448— 1-2 Byte Buffer Overflow in wolfSSL_X509_notAfter/notBefore
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I. Basic Information for CVE-2026-5448
Vulnerability Information
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Vulnerability Title
1-2 Byte Buffer Overflow in wolfSSL_X509_notAfter/notBefore
Source: NVD (National Vulnerability Database)
Vulnerability Description
X.509 date buffer overflow in wolfSSL_X509_notAfter / wolfSSL_X509_notBefore. A buffer overflow may occur when parsing date fields from a crafted X.509 certificate via the compatibility layer API. This is only triggered when calling these two APIs directly from an application, and does not affect TLS or certificate verify operations in wolfSSL.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
wolfSSL 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
wolfSSL（CyaSSL）是美国wolfSSL公司的一个针对嵌入式系统开发人员使用的小的、可移植的嵌入式SSL编程库。 wolfSSL存在安全漏洞，该漏洞源于解析X.509证书日期字段时存在缓冲区溢出，可能导致通过兼容层API调用时触发缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-5448
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Same Patch Batch · wolfSSL · 2026-04-09 · 16 CVEs total
| CVE-2026-5263 | URI nameConstraints not enforced in ConfirmNameConstraints() | |
| CVE-2026-5187 | Heap Out-of-Bounds Write in DecodeObjectId() in wolfSSL | |
| CVE-2026-5264 | DTLS 1.3 ACK heap buffer overflow | |
| CVE-2026-5295 | Stack Buffer Overflow in wolfSSL PKCS7 wc_PKCS7_DecryptOri() via Oversized OID | |
| CVE-2026-5393 | OOB Read in DoTls13CertificateVerify with WOLFSSL_DUAL_ALG_CERTS | |
| CVE-2026-5446 | wolfSSL ARIA-GCM TLS 1.2/DTLS 1.2 GCM nonce reuse | |
| CVE-2026-5504 | PKCS7 CBC Padding Oracle — Plaintext Recovery | |
| CVE-2026-5447 | Heap buffer overflow in CertFromX509() via AuthorityKeyIdentifier | |
| CVE-2026-5778 | Integer underflow leads to out-of-bounds access in sniffer ChaCha decrypt path. | |
| CVE-2026-5772 | MatchDomainName 1-Byte Stack Buffer Over-Read in Hostname Validation | |
| CVE-2026-5507 | Session Cache Restore — Arbitrary Free via Deserialized Pointer | |
| CVE-2026-5194 | wolfSSL ECDSA Certificate Verification | |
| CVE-2026-5392 | wolfSSL heap OOB read in PKCS7 SignedData streaming | |
| CVE-2026-5460 | Heap Use-After-Free in PQC Hybrid KeyShare Error Cleanup in wolfSSL TLS 1.3 | |
| CVE-2026-5503 | out-of-bounds write in TLSX_EchChangeSNI via attacker-controlled publicName |
IV. Related Vulnerabilities
Same product: wolfSSL
- CVE-2026-5477
Prefix-substitution forgery via integer overflow in wolfCryp - CVE-2026-5188
Integer underflow in X.509 SAN parsing in wolfSSL - CVE-2026-5500
Improper Validation of AES-GCM Authentication Tag Length in - CVE-2026-5501
Improper Certificate Signature Verification in X.509 Chain V - CVE-2026-5466
wc_VerifyEccsiHash missing sanity check
Same vendor: wolfSSL
- CVE-2026-0930
Potential wolfSSHd Buffer out-of-bounds Read on Windows Hand - CVE-2026-5477
Prefix-substitution forgery via integer overflow in wolfCryp - CVE-2026-5188
Integer underflow in X.509 SAN parsing in wolfSSL - CVE-2026-5500
Improper Validation of AES-GCM Authentication Tag Length in - CVE-2026-5501
Improper Certificate Signature Verification in X.509 Chain V
Same weakness: CWE-122
- CVE-2026-8261
Squirrel sqobject.cpp Load heap-based overflow - CVE-2026-8213
OSGeo gdal Grid File GDapi.c GDSDfldsrch heap-based overflow - CVE-2026-8212
OSGeo gdal SWapi.c SWSDfldsrch heap-based overflow - CVE-2026-42309
Pillow: Heap buffer overflow with nested list coordinates - CVE-2026-45130
Vim: Heap Buffer Overflow in spell file loading
V. Comments for CVE-2026-5448
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