CVE-2023-51767 @ Bullseye
Status
new
Priority
0.92
Match score
3.0
Risk
AuthBypass
priv:user
CVSS
7.0 HIGH
Reason
cpe: openssh; pkgs: openssh-client, openssh-server, openssh-sftp-server; version: unknown (openssh-client-8.4p1-5+deb11u7; openssh-server-8.4p1-5+deb11u7; openssh-sftp-server-8.4p1-5+deb11u7); risk:auth_bypass
Created
2026-10-15T10:20:08Z
Updated
2026-10-20T10:18:22Z
Package interrogation (copy)
Run on the host — click to copy a command. Debian/apt
| Package | Commands |
|---|---|
| openssh-client-8.4p1-5+deb11u7 | |
| openssh-server-8.4p1-5+deb11u7 | |
| openssh-sftp-server-8.4p1-5+deb11u7) | |
| openssh | |
| openssh-client-1:8.4p1-5+deb11u7 | |
| openssh-server-1:8.4p1-5+deb11u7 | |
| openssh-sftp-server-1:8.4p1-5+deb11u7 |
Inventory lookup
Search package inventory across systems, then return here. Create a ticket on systems the matcher missed.
Suggestions: openssh-client · openssh-server · openssh-sftp-server · openssh
| System | Matches | Ticket for CVE-2023-51767 | |
|---|---|---|---|
| Archive | openssh-sftp-server 1:7.9p1-10+deb10u4 | new open | |
| Bullseye | openssh-sftp-server 1:8.4p1-5+deb11u7 | new open | |
| Helios | openssh-sftp-server 1:8.4p1-5+deb11u7 | new open | |
| Janus | openssh-sftp-server 1:7.9p1-10+deb10u4 | new open | |
| Library | openssh-sftp-server 1:7.4p1-10+deb9u7 | new open | |
| Matrix | openssh-sftp-server 1:9.2p1-2+deb12u10 | new open | |
| Saiph | openssh-sftp-server 1:7.9p1-10+deb10u4 | new open | |
| Silk | openssh-sftp-server 1:9.2p1-2+deb12u10 | new open |
Same product CVEs in your queue
Other open tickets that look like the same product. Closed tickets are omitted unless they are already pegged to this CVE.
| CVE | CVSS | KEV | Systems | Status | Matched | Already related | |
|---|---|---|---|---|---|---|---|
| CVE-2023-38408 | 9.8 | Archive, Janus, Library, Saiph, morris … | new | openssh-client | — | ||
| CVE-2026-3497 | 7.5 | Archive, Janus, Library, Saiph, morris … | new | openssh-client | — | ||
| CVE-2020-15778 | 7.4 | Archive, Janus, Library, Saiph, morris … | new | openssh-client | — |
Related CVE (same fix)
Point this ticket’s CVE at a higher-priority / same-fix primary so you only triage one.
Host OS / kernel
OS
Debian GNU/Linux 11 (bullseye)
(11)
· debian
Arch
x86_64
kernel_release
uname -r → 5.10.0-45-amd64kernel_version
uname -v → #1 SMP Debian 5.10.259-1 (2026-07-02)For Linux kernel CVEs, kernel_version (Debian packaging / build string) often decides fixed vs not; kernel_release is used for upstream NVD range compares.
Same CVE on other hosts
Open the ticket for this CVE on another system.
| System | Status | Priority | Updated | |
|---|---|---|---|---|
| morris | new | 6.12 | 2026-10-20T10:18:22Z | Open |
| mufasa | new | 6.12 | 2026-10-20T10:18:22Z | Open |
| Silk | new | 3.68 | 2026-10-20T10:18:22Z | Open |
| Library | new | 1.84 | 2026-10-20T10:18:22Z | Open |
| Matrix | new | 1.84 | 2026-10-20T10:18:22Z | Open |
| Archive | new | 0.92 | 2026-10-20T10:18:22Z | Open |
| Helios | new | 0.92 | 2026-10-20T10:18:22Z | Open |
| Janus | new | 0.92 | 2026-10-20T10:18:22Z | Open |
| Saiph | new | 0.92 | 2026-10-20T10:18:22Z | Open |
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."
Update status
Add note only
References
- https://access.redhat.com/security/cve/CVE-2023-51767
- https://arxiv.org/abs/2309.02545
- https://bugzilla.redhat.com/show_bug.cgi?id=2255850
- https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/auth-passwd.c#L77
- https://github.com/openssh/openssh-portable/blob/8241b9c0529228b4b86d88b1a6076fb9f97e4a99/monitor.c#L878
- https://security.netapp.com/advisory/ntap-20240125-0006/
- https://ubuntu.com/security/CVE-2023-51767
- https://www.openwall.com/lists/oss-security/2025/09/22/1
- http://www.openwall.com/lists/oss-security/2025/09/22/1
- http://www.openwall.com/lists/oss-security/2025/09/22/2
- http://www.openwall.com/lists/oss-security/2025/09/23/1
- http://www.openwall.com/lists/oss-security/2025/09/23/3
- http://www.openwall.com/lists/oss-security/2025/09/23/4
- http://www.openwall.com/lists/oss-security/2025/09/23/5
- http://www.openwall.com/lists/oss-security/2025/09/24/4
NVD: CVE-2023-51767