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Vulnerabilities / CVE-2023-6936

critical

CVE-2023-6936

In wolfSSL prior to 5.6.6, if callback functions are enabled (via the ...

Published Modified CWE 125, 126
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Julia9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, Julia.

Description

In wolfSSL prior to 5.6.6, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS client or network attacker can trigger a buffer over-read on the heap of 5 bytes (WOLFSSL_CALLBACKS is only intended for debugging).

Affected packages and fixed versions

SourcePackageFixed in
julia::Julia Ecosystem Security AdvisorieswolfSSL_jll5.7.2+0
alpine 3.19wolfssl0
alpine 3.20wolfssl0
alpine 3.21wolfssl0
alpine 3.22wolfssl0
alpine 3.23wolfssl0
alpine 3.24wolfssl0
alpine edgewolfssl0
debian 11wolfsslno fix listed
debian 12wolfsslno fix listed
debian 13wolfssl5.6.6-1.2
echowolfssl5.6.6-1.2
Show all 14 entries from 14 sources
SourcePackageFixed in
julia::Julia Ecosystem Security AdvisorieswolfSSL_jll5.7.2+0
alpine 3.19wolfssl0
alpine 3.20wolfssl0
alpine 3.21wolfssl0
alpine 3.22wolfssl0
alpine 3.23wolfssl0
alpine 3.24wolfssl0
alpine edgewolfssl0
debian 11wolfsslno fix listed
debian 12wolfsslno fix listed
debian 13wolfssl5.6.6-1.2
echowolfssl5.6.6-1.2
rapidfort debian 12wolfssl0:5.6.6-1.2
rapidfort debian 13wolfssl0:5.6.6-1.2

References

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.