CVE-2023-51767
HIGHCVSS v3.1: 7.0 · EPSS: 0.0001 (0.5 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 7.0 v3.1 · NVD
- EPSS
- 0.0001 (0.5 percentile) · FIRST.org
- CISA KEV
- No
- Attack conditions (CVSS vector)
- No user interaction · Source: NVD Vector
- Affected vendors
- openbsd, fedoraproject, redhat
- Published
- 2023-12-24 · Modified: 2026-06-02
- References
- Jump to references (8)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
Description
OpenSSH through 10.0, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer value of authenticated in mm_answer_authpassword does not resist flips of a single bit. NOTE: this is applicable to a certain threat model of attacker-victim co-location in which the attacker has user privileges. NOTE: this is disputed by the Supplier, who states "we do not consider it to be the application's responsibility to defend against platform architectural weaknesses."
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Distro https://access.redhat.com/security/cve/CVE-2023-51767
- Reference https://arxiv.org/abs/2309.02545
- Distro https://bugzilla.redhat.com/show_bug.cgi?id=2255850
- Reference https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/…
- Reference https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/…
- Distro https://security.netapp.com/advisory/ntap-20240125-0006/
- Distro https://ubuntu.com/security/CVE-2023-51767
- Reference https://www.openwall.com/lists/oss-security/2025/09/22/1