CVE-2026-2646
Heap buffer overflow in session parsing with wolfSSL_d2i_SSL_SESSION() function
- State
- Published
- Severity
- 5.0 Medium
- Published
- Mar 19, 2026
- Updated
- Mar 19, 2026
- Reserved
- Feb 17, 2026
Description
A heap-buffer-overflow vulnerability exists in wolfSSL's wolfSSL_d2i_SSL_SESSION() function. When deserializing session data with SESSION_CERTS enabled, certificate and session id lengths are read from an untrusted input without bounds validation, allowing an attacker to overflow fixed-size buffers and corrupt heap memory. A maliciously crafted session would need to be loaded from an external source to trigger this vulnerability. Internal sessions were not vulnerable.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.0 Medium | CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:P | wolfSSL |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
wolfsslwolfssl |
|
References
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