CVE-2025-11932— Timing Side-Channel in PSK Binder Verification
Quick assessment
Affected
wolfSSL wolfSSL
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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TLS 1.3 PSK绑定器验证使用非恒定时间方法，可能导致信息泄露。
Possible ATT&CK Techniques 1 AI
T1216 · System Script Proxy Execution
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I. Basic Information for CVE-2025-11932
Vulnerability Information
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Vulnerability Title
Timing Side-Channel in PSK Binder Verification
Source: CVE Program / CVE List V5
Vulnerability Description
The server previously verified the TLS 1.3 PSK binder using a non-constant time method which could potentially leak information about the PSK binder
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过差异性导致的信息暴露
Source: CVE Program / CVE List V5
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TLS 1.3 PSK绑定器验证使用非恒定时间方法，可能导致信息泄露。
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-2025-11932
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · wolfSSL · 2025-11-21 · 7 CVEs total
| CVE-2025-11934 | Improper Validation of Signature Algorithm Used in TLS 1.3 CertificateVerify | |
| CVE-2025-11935 | Forward Secrecy Violation in WolfSSL TLS 1.3 | |
| CVE-2025-11936 | Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 Clie | |
| CVE-2025-12888 | Constant Time Issue with Xtensa-based ESP32 and X22519 | |
| CVE-2025-11931 | Integer Underflow Leads to Out-of-Bounds Access in XChaCha20-Poly1305 Decrypt | |
| CVE-2025-12889 | TLS 1.2 Client Can Downgrade Digest Used |
IV. Related Vulnerabilities
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Failed X509_verify_cert leaves unverified CA in shared CertM
Same vendor: wolfSSL
-
CVE-2026-15442
Heap use-after-free on read during bidirectional (D)TLS shut -
CVE-2026-89102
OCSP stapling v2 multi accepts non-CA chain certificates as -
CVE-2026-89133
NameConstraints not enforced across unconstrained intermedia -
CVE-2026-89134
Subject CN name-constraint check bypassed when non-DNS SAN p -
CVE-2026-89135
Failed X509_verify_cert leaves unverified CA in shared CertM
Same weakness: CWE-203
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V. Comments for CVE-2025-11932
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