{"cve":"CVE-2023-6918","nvd":{"published":"2023-12-19T00:15:08.460","modified":"2026-06-17T06:51:40.940","status":"Modified","description":"A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-252"],"references":["https://access.redhat.com/errata/RHSA-2024:2504","https://access.redhat.com/errata/RHSA-2024:3233","https://access.redhat.com/security/cve/CVE-2023-6918","https://bugzilla.redhat.com/show_bug.cgi?id=2254997","https://www.libssh.org/2023/12/18/libssh-0-10-6-and-libssh-0-9-8-security-releases/"],"products":["fedoraproject:fedora","libssh:libssh","redhat:enterprise_linux"],"source":"nvd","synced_at":"2026-10-19T21:42:34.585441961+00:00"},"epss":{"cve":"CVE-2023-6918","score":0.01409,"percentile":0.72645,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}