Vulnerability · Published Dec 11, 2025 · Assigned by wolfSSL
CVE-2025-13912Potential non-constant time compiled code with Clang LLVM
Low 1.0
In plain English
A low-severity security flaw in wolfSSL from wolfSSL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).
Severity (CVSS 4.0)1.0Low
Exploit odds (30 days)0.1%top 96.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Multiple constant-time implementations in wolfSSL before version 5.8.4 may be transformed into non-constant-time binary by LLVM optimizations, which can potentially result in observable timing discrepancies and lead to information disclosure through timing side-channel attacks.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wolfssl | no fix listed | DEBIAN-CVE-2025-13912 |
| Debian:13 | wolfssl | no fix listed | DEBIAN-CVE-2025-13912 |
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2025-13912 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2025-13912 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2025-13912 |
Affected products (as reported)
Weakness: CWE-203 · Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N