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CVE-2026-106553VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-106553· Low 2.2

Not known to be exploited · CVSS 2.2 Low : upgrade Red Hat to 10.6 when convenient.

Data as of 30 Oct 2026, 02:32 UTC

CVSS 3.1 base score
2.2Low
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 10.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade OpenSSH to 10.6.

Affected software

ProductAffectedFixed in
OpenBSDOpenSSHAffected
  • <10.6
Fixed in
  • 10.6

AI-suggested

Red Hat recommends disabling GSSAPIAuthentication in the sshd configuration (e.g., set GSSAPIAuthentication no in /etc/ssh/sshd_config) and restarting the sshd service to prevent the issue. The vulnerability only occurs when GSSAPI authentication is enabled. Applying the forthcoming update to the Red Hat Hardened Images package containing the fixed openssh version (10.6 or later) will resolve the issue. No other actions are required.

Description

A vulnerability in OpenSSH within Red Hat Hardened Images allows leftover GSSAPI credentials to persist after a failed authentication attempt when GSSAPIAuthentication is enabled. An authenticated user who subsequently authenticates through another method may access these lingering credentials, leading to information disclosure. The flaw affects the confidentiality of residual credentials but does not impact integrity or availability. GSSAPI authentication is disabled by default, and the issue only occurs if it is enabled. Red Hat has released an update to address this issue.

References

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