CVE-2023-51767

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Summary

CVECVE-2023-51767
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-12-24 07:15:07 UTC
Updated2026-06-02 16:16:28 UTC
DescriptionOpenSSH 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."

Risk And Classification

Primary CVSS: v3.1 7 HIGH from [email protected]

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

EPSS: 0.000070000 probability, percentile 0.004930000 (date 2026-06-02)

Problem Types: NVD-CWE-Other | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1ADPDECLARED7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 39 All All All
Application Openbsd Openssh All All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux 9.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2025/09/23/5 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/26/4 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/23/4 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/29/6 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/29/5 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
access.redhat.com/security/cve/CVE-2023-51767 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
bugzilla.redhat.com/show_bug.cgi af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
www.openwall.com/lists/oss-security/2025/09/29/4 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
ubuntu.com/security/CVE-2023-51767 af854a3a-2127-422b-91ae-364da2661108 ubuntu.com Third Party Advisory
www.openwall.com/lists/oss-security/2025/09/23/1 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/24/7 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/22/1 [email protected] www.openwall.com
www.openwall.com/lists/oss-security/2025/09/24/4 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/29/1 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/26/2 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/23/3 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
CVE-2023-51767 OpenSSH Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
www.openwall.com/lists/oss-security/2025/09/27/1 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb... af854a3a-2127-422b-91ae-364da2661108 github.com Product
www.openwall.com/lists/oss-security/2025/09/22/1 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/25/6 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
[2309.02545] Mayhem: Targeted Corruption of Register and Stack Variables af854a3a-2127-422b-91ae-364da2661108 arxiv.org Technical Description
www.openwall.com/lists/oss-security/2025/10/01/2 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/22/2 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/27/3 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/10/01/1 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/27/2 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb... af854a3a-2127-422b-91ae-364da2661108 github.com Product
www.openwall.com/lists/oss-security/2025/09/27/5 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/25/2 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/28/7 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/27/4 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/27/7 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
www.openwall.com/lists/oss-security/2025/09/27/6 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 38915 OpenSSH Multiple Vulnerabilities
  • 38919 OpenSSH Authentication Bypass Vulnerability
  • 908034 Common Base Linux Mariner (CBL-Mariner) Security Update for openssh (32269-1)
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