CVE-2022-42905
Published Nov 6, 2022 · Updated Oct 23, 2026
Original summary
Normalized public record · Updated Oct 23, 2026
In wolfSSL before 5.5.2, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS 1.3 client or network attacker can trigger a buffer over-read on the heap of 5 bytes. (WOLFSSL_CALLBACKS is only intended for debugging.)
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
In wolfSSL before 5.5.2, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS 1.3 client or network attacker can trigger a buffer over-read on the heap of 5 bytes. (WOLFSSL_CALLBACKS is only intended for debugging.)
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 20%
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- www.wolfssl.com ↗
- Source repository ↗
- Source repository ↗
- 20230119 wolfSSL before 5.5.2: Heap-buffer over-read with WOLFSSL_CALLBACKS ↗
- packetstormsecurity.com ↗
- blog.trailofbits.com ↗
Record history
Published Nov 6, 2022 · Last refreshed Oct 23, 2026