CVE-2026-60002: OpenSSH: ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key du…

Critical 9.4 EPSS 0.3% OpenSSH

ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. (This outcome occurs only on the client side.)

CVE-2026-60002CVE identifier
9.4CVSS 3.1 base score (critical)
0.3%EPSS: chance of exploitation in the next 30 days (higher than 23% of CVEs)
2026-07-08published

What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms

What to do now

Check whether you run OpenSSH and which version (commands below).
Install the fixed version for your system: see “Patch it” below.
sudo systemctl restart ssh (Debian/Ubuntu) or sshd (RHEL/SUSE/Fedora/Arch/Amazon); Alpine: rc-service sshd restart; FreeBSD: service sshd restart

Affected and fixed versions

Affected:

OpenBSD OpenSSH before 10.4

Patch it

Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.

Debian

sudo apt update
sudo apt install --only-upgrade openssh-server openssh-client

Ubuntu

sudo apt update
sudo apt install --only-upgrade openssh-server openssh-client

RHEL, AlmaLinux, Rocky, Oracle

sudo dnf upgrade --refresh openssh-server openssh

Fedora

sudo dnf upgrade --refresh openssh-server openssh

SUSE / openSUSE

sudo zypper refresh
sudo zypper update openssh openssh-server

Amazon Linux

sudo dnf upgrade --releasever=latest openssh-server openssh

Arch Linux

sudo pacman -Syu

Alpine

apk update && apk upgrade openssh openssh-server

FreeBSD

pkg update && pkg upgrade openssh-portable (port; the base-system sshd is patched with freebsd-update)

General update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.

Fix status in Linux distributions

Release	Package	Status	Fixed version / advisory
Debian 12	`openssh`	not fixed yet
Debian 13	`openssh`	not fixed yet
Debian testing	`openssh`	fixed	`1:10.4p1-1`
Red Hat Enterprise Linux 9	`openssh-0:9.9p1-9.el9_8`	fixed	`RHSA-2026:47756`
Red Hat Enterprise Linux 10	`openssh-0:9.9p1-25.el10_2`	fixed	`RHSA-2026:47757`

From the Debian security tracker, Ubuntu CVE tracker and Red Hat Security Data API, refreshed every few hours.

Sources

Page generated automatically from official sources on 2026-11-03 18:05 UTC. Always confirm with your vendor's advisory.