Read the docs
TI-2026-69091 Aliases CVE-2026-106584GHSA-9hq3-hc6p-gc8q

Daylight Saving mishandling in OpenSSH ssh-keygen skews certificate expiry

Priority LOW 14CWE-193Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

OpenSSH before 10.6 has a flaw in ssh-keygen where certificates can get incorrect expiration times because Daylight Saving time changes are mishandled. The weakness is an off-by-one error (CWE-193). A local user with low privileges can cause the effect, with a slightly more severe impact for users in certain Antarctic locations.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

In ssh-keygen in OpenSSH before 10.6, certificates could have incorrect expiration times because of Daylight Saving mishandling. There can be a slightly more severe effect on users in certain Antarctic locations.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00056 0th percentileScored 2026-11-07
Fix Fixed OpenSSH (OpenBSD): 10.6Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenBSDOpenSSHbefore 10.610.6Patch availableCNA
  • OpenSSH VendorOpenBSD Affected before 10.6 Fixed in 10.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*before 10.6VulnerableOpenBSD
  • cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* Versions before 10.6 Vulnerable ·OpenBSD

Remediation

Upgrade OpenSSH to version 10.6. Red Hat fixes Red Hat Hardened Images in RHSA-2026:82247, released 2026-10-13.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA OpenSSH (OpenBSD) Fixed in 10.6

Red Hat 1 advisory

  • RHSA-2026:82247 Released 2026-10-13 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images openssh-10.5p1-1.2.hum1@aarch64, openssh-10.5p1-1.2.hum1@s390x, openssh-10.5p1-1.2.hum1@src +19

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    OpenBSD OpenSSH 10.6

    9 records Highest priority Priority LOW 9 LOW

    Other records, highest priority first

    • TI-2026-69092 Missing packet length check in OpenSSH sshd and ssh decompressionPriority LOW 34
    • TI-2026-69090 Injection via command-line usernames in OpenSSH ssh clientPriority LOW 33
    • TI-2026-69088 GSSAPI authentication state persists across attempts in OpenSSH sshdPriority LOW 32
    Show all 9 records →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:82247

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-106584
  2. 2026-10-07 Alias added: GHSA-9hq3-hc6p-gc8q
  3. 2026-10-07 CISA SSVC decision points changed
  4. 2026-10-13 CVSS score added · NVD
  5. 2026-10-20 Fix available: RHSA-2026:82247 · Red Hat
  6. 2026-10-20 Fix available: Red Hat Hardened Images · Red Hat
  7. 2026-10-20 CVSS score added · Red Hat

References

Other 1

  • TI-2023-19792 The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently… CVSS 3.1CRITICAL 9.8
  • TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
  • TI-2023-10601 OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during… CVSS 3.1MEDIUM 6.5
  • TI-2018-11033 OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying… CVSS 3.1MEDIUM 5.9
  • TI-2016-08105 Untrusted search path vulnerability in ssh-agent.c in ssh-agent in OpenSSH before 7.4… CVSS 3.1HIGH 7.3
  • TI-2023-28040 In ssh in OpenSSH before 9.6, OS command injection might occur if a user name or host… CVSS 3.1MEDIUM 6.5
See all 145 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences