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Vulnerability details: VCID-2gku-dprh-sqdy
Vulnerability ID VCID-2gku-dprh-sqdy
Aliases CVE-2023-6918
Summary Unchecked Return Value 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.
Status Published
Exploitability 0.5
Weighted Severity 3.3
Risk 1.6
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-252 Unchecked Return Value
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 3.7 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-6918.json
epss 0.00363 https://api.first.org/data/v1/epss?cve=CVE-2023-6918
epss 0.00363 https://api.first.org/data/v1/epss?cve=CVE-2023-6918
epss 0.00363 https://api.first.org/data/v1/epss?cve=CVE-2023-6918
epss 0.00363 https://api.first.org/data/v1/epss?cve=CVE-2023-6918
epss 0.00363 https://api.first.org/data/v1/epss?cve=CVE-2023-6918
epss 0.00363 https://api.first.org/data/v1/epss?cve=CVE-2023-6918
epss 0.00363 https://api.first.org/data/v1/epss?cve=CVE-2023-6918
epss 0.00363 https://api.first.org/data/v1/epss?cve=CVE-2023-6918
cvssv3.1 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-6918.json
https://api.first.org/data/v1/epss?cve=CVE-2023-6918
https://bugzilla.redhat.com/show_bug.cgi?id=2254997
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-48795
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6004
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6918
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB/
https://www.libssh.org/2023/12/18/libssh-0-10-6-and-libssh-0-9-8-security-releases/
1059059 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1059059
CVE-2023-6918 https://access.redhat.com/security/cve/CVE-2023-6918
CVE-2023-6918 https://nvd.nist.gov/vuln/detail/CVE-2023-6918
RHSA-2024:2504 https://access.redhat.com/errata/RHSA-2024:2504
RHSA-2024:3233 https://access.redhat.com/errata/RHSA-2024:3233
USN-6592-1 https://usn.ubuntu.com/6592-1/
USN-6592-2 https://usn.ubuntu.com/6592-2/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-6918.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.58367
EPSS Score 0.00363
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:52:19.164255+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/conan/libssh2/CVE-2023-6918.yml 38.0.0