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CVE-2026-10512— X25519 x86_64 assembly final reduction leaves non-canonical field element

AI Predicted 7.5 Difficulty: Easy EPSS 0.26% · P18

Possible ATT&CK Techniques 1AI

T1552.001 · Credentials In Files

Affected Version Matrix 1

VendorProductVersion RangeStatus
wolfSSLwolfSSL5.6.4≤ 5.9.1affected
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I. Basic Information for CVE-2026-10512

Vulnerability Information
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Vulnerability Title
X25519 x86_64 assembly final reduction leaves non-canonical field element
Source: CVE Program / CVE List V5
Vulnerability Description
The X25519 x86_64 assembly implementation fails to clear the most significant bit during the final modular reduction, so the computed result may not be fully reduced modulo the field prime 2^255 - 19. This can leave the field element in a non-canonical form, producing an incorrect result from the scalar multiplication and potentially a wrong shared secret. The final carry-propagation chains in the x64 and AVX2 reduction routines could overflow into the top bit, and the high limb was not masked afterward, so the 255-bit field element was left non-canonical.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
数值计算不正确
Source: CVE Program / CVE List V5
Vulnerability Title
wolfSSL 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
wolfSSL是wolfSSL公司开源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 5.6.4版本至5.9.1及之前版本存在数字错误漏洞，该漏洞源于X25519 x86_64汇编实现中最终模约减时未能清除最高有效位，可能导致计算出的255位域元素未完全约减，产生非规范形式的元素，从而造成标量乘法结果错误，可能生成错误共享密钥。
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

VendorProductAffected VersionsCPESubscribe
wolfSSLwolfSSL 5.6.4 ~ 5.9.1 -

II. Public POCs for CVE-2026-10512

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III. Intelligence Information for CVE-2026-10512

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Patches & Fixes for CVE-2026-10512 (1)

Vendor Pages for CVE-2026-10512 (1)

Same Patch Batch · wolfSSL · 2026-06-25 · 32 CVEs total

CVE-2026-6679DTLS 1.3 ACK serialization heap buffer overflow via integer truncation
CVE-2026-55958Renesas TSIP TLS 1.3 transcript buffer out-of-bounds write in tsip_StoreMessage
CVE-2026-55960Un-negotiated Raw Public Key (RFC 7250) accepted in place of X.509, bypassing chain valida
CVE-2026-55967AES-GCM streaming APIs do not reject >64 GiB cumulative single messages, enabling counter
CVE-2026-55961wolfSSL_PKCS7_verify() reports success for degenerate (certs-only) PKCS#7 with no signer
CVE-2026-55962TLS 1.3 post-handshake authentication: server accepts Finished without client Certificate/
CVE-2026-55964Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA (temporary CA exem
CVE-2026-8720HMAC-BLAKE2 final discards message when key length exceeds block size
CVE-2026-12340Out-of-bounds heap read in SM2/SM3 certificate Subject Key Identifier computation
CVE-2026-10097ML-KEM-1024 x64 AVX2 incomplete cipher text comparison enables IND-CCA2 break and static p
CVE-2026-10098OCSP CertID serial-number length-confusion in wolfSSL_OCSP_resp_find_status
CVE-2026-10592Wildcard DNS SAN bypasses CA name-constraint checks
CVE-2026-11310X.509 trust-chain bypass in wolfSSL_X509_verify_cert() via untrusted intermediate anchorin
CVE-2026-11703Missing SNI/ALPN binding on stateful (session-ID) TLS session resumption
CVE-2026-11999X.509 trust-chain bypass via path-depth exhaustion in wolfSSL_X509_verify_cert()
CVE-2026-6329PKCS#12 MAC verification uses attacker-controlled comparison length
CVE-2026-7532iPAddress name constraints not enforced when WOLFSSL_IP_ALT_NAME is undefined
CVE-2026-6094Heap buffer overread in wc_PKCS7_DecodeEnvelopedData parsing crafted PKCS7 EnvelopedData
CVE-2026-6731X.509 name constraint bypass via Subject CN treated as a DNS name
CVE-2026-6325Out-of-bounds write in SetSuitesHashSigAlgo on oversized signature algorithms list

Showing top 20 of 32 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: wolfSSL
Same vendor: wolfSSL
Same weakness: CWE-682

V. Comments for CVE-2026-10512

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