CVE-2026-5772
MatchDomainName 1-Byte Stack Buffer Over-Read in Hostname Validation
- State
- Published
- Severity
- 2.1 Low
- Published
- Apr 9, 2026
- Updated
- Apr 10, 2026
- Reserved
- Apr 8, 2026
Description
A 1-byte stack buffer over-read was identified in the MatchDomainName function (src/internal.c) during wildcard hostname validation when the LEFT_MOST_WILDCARD_ONLY flag is active. If a wildcard * exhausts the entire hostname string, the function reads one byte past the buffer without a bounds check, which could cause a crash.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.1 Low | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | wolfSSL |
Weaknesses
- CWE-126 Buffer over-read
Affected Products
| Product | Versions |
|---|---|
wolfSSLwolfSSL |
|
References
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