01 Record

CVE-2023-51767

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

HighPUBLISHEDCNA: mitre

CNA base score7.0 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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02 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

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.66% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 49.0% of scored records. A rank, not a probability.

NVD base score

7.0 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2023-12-24 00:00Z2 YR AGO

Last updated

2026-06-02 15:08Z3 MO AGO

Reserved

2023-12-24

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 7.0)

CNA CVSS vector

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

Weaknesses

CWE-287Improper AuthenticationClass

Data version

5.2

Document digest

67d1a2a64408fb6142a0d354d5f16d70fdd57d0a6e5b66a315bdb503d0b66799

05 Affected products

VendorProductVersionsPlatforms

fedoraprojectfedoraNot specified—

openbsdopensshNot specified—

redhatenterprise_linuxNot specified—

redhathummingbirdNot specified—

06 References

arxiv.orghttps://arxiv.org/abs/2309.02545
github.comhttps://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878
github.comhttps://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77
bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2255850
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-51767
ubuntu.comhttps://ubuntu.com/security/CVE-2023-51767
security.netapp.comhttps://security.netapp.com/advisory/ntap-20240125-0006/
www.openwall.comhttps://www.openwall.com/lists/oss-security/2025/09/22/1
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/10/01/1
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/22/1
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/24/4
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/22/2
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/23/4
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/10/01/2
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/26/2
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/26/4
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/27/1
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/27/2
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/27/3
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/27/5
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/27/6
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/27/7
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/29/4
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/29/5
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/23/1
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/29/6
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/23/3
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/23/5
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/24/7
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/25/2
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/25/6
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/27/4
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/28/7
www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/29/1

01 Record index

CVE-2023-51767

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2023-51767

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References