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OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."
| Reporter | Title | Published | Views | Family All 152 |
|---|---|---|---|---|
 | FreeBSD -- OpenSSH pre-authentication double free | 16 Feb 202300:00 | – | freebsd |
 | Exploit for Double Free in Openbsd Openssh | 3 Jun 202312:36 | – | githubexploit |
| Exploit for CVE-2022-21449 | 7 Feb 202315:33 | – | githubexploit |
| Exploit for Double Free in Openbsd Openssh | 22 Feb 202319:44 | – | githubexploit |
| Exploit for Double Free in Openbsd Openssh | 18 Apr 202321:47 | – | githubexploit |
| Exploit for Double Free in Openbsd Openssh | 18 Nov 202514:24 | – | githubexploit |
| Exploit for Double Free in Openbsd Openssh | 16 Jan 202506:07 | – | githubexploit |
| Exploit for Double Free in Openbsd Openssh | 28 Apr 202319:46 | – | githubexploit |
| Exploit for Double Free in Openbsd Openssh | 21 Sep 202312:05 | – | githubexploit |
| Exploit for Double Free in Openbsd Openssh | 7 Feb 202315:33 | – | githubexploit |
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02 Oct 2025 06:11Current
7High risk
Vulners AI Score7
CVSS 3.16.5
EPSS0.88329
SSVC