CVE-2026-106585: In sshd and ssh in OpenSSH before 10.6, there is no check for whether the maximum packet length is exceeded du

Q: How do I fix CVE-2026-106585?

openssh: upgrade to 10.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-106585 being exploited?

CVE-2026-106585 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-106585 affect?

CVE-2026-106585 affects openssh. Severity is medium (CVSS 6.5). In sshd and ssh in OpenSSH before 10.6, there is no check for whether the maximum packet length is exceeded during decompression of highly compressed data.

Q: How urgent is CVE-2026-106585?

Priority 35/100. Remotely exploitable, no login, no user action; On your watchlist

Routine

MEDIUM 6.5REMOTEWATCHLISTUPGRADE

CVE-2026-106585 is a medium-severity flaw (CVSS 6.5) affecting openssh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In sshd and ssh in OpenSSH before 10.6, there is no check for whether the maximum packet length is exceeded during decompression of highly compressed data.

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-409
Published	2026-10-06
Last modified	2026-10-15

Publisher (CNA): MITRE · Vendor: openbsd

Last updated 2026-10-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-06 21:17 UTCPublished CVE record published
2026-10-15 19:17 UTCUpdated Record last modified

openbsd openssh UPGRADE

Affected: < 10.6

Fixed in: 10.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openssh || rpm -q openssh || openssh --version

2. UPGRADE to 10.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openssh

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openssh

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-106585?

openssh: upgrade to 10.6. Exact commands for each OS are on this page.

Is CVE-2026-106585 being exploited?

CVE-2026-106585 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-106585 affect?

CVE-2026-106585 affects openssh. Severity is medium (CVSS 6.5). In sshd and ssh in OpenSSH before 10.6, there is no check for whether the maximum packet length is exceeded during decompression of highly compressed data.

How urgent is CVE-2026-106585?

Priority 35/100. Remotely exploitable, no login, no user action; On your watchlist

Software pages

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References

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