RHSA-2026:21298HighCVSS 7.5

Red Hat Security Advisory: openssh security update

Published
May 27, 2026
Last Modified
August 31, 2026

🔗 CVE IDs covered (5)

CVE-2026-35387 →CVE-2026-35388 →CVE-2026-35414 →CVE-2026-35385 →CVE-2026-35386 →

📋 Description

CVE-2026-35385 — OpenSSH: OpenSSH: Privilege escalation via scp legacy protocol when not preserving file mode CVE-2026-35386 — OpenSSH: OpenSSH: Arbitrary command execution via shell metacharacters in username CVE-2026-35387 — OpenSSH: OpenSSH: Information disclosure due to unintended cryptographic algorithm usage CVE-2026-35388 — OpenSSH: OpenSSH: Low integrity impact from unconfirmed proxy-mode multiplexing sessions CVE-2026-35414 — OpenSSH: OpenSSH: Security bypass via mishandling of authorized_keys principals option

🎯 Affected products84

  • Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • openssh-0:8.0p1-20.el8_8.4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-0:8.0p1-20.el8_8.4.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-0:8.0p1-20.el8_8.4.src as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • openssh-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • openssh-askpass-0:8.0p1-20.el8_8.4.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • openssh-askpass-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • openssh-askpass-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • openssh-askpass-debuginfo-0:8.0p1-20.el8_8.4.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • openssh-askpass-debuginfo-0:8.0p1-20.el8_8.4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-askpass-debuginfo-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • openssh-askpass-debuginfo-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • openssh-askpass-debuginfo-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-askpass-debuginfo-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • openssh-cavs-0:8.0p1-20.el8_8.4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-cavs-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-cavs-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • openssh-cavs-debuginfo-0:8.0p1-20.el8_8.4.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • openssh-cavs-debuginfo-0:8.0p1-20.el8_8.4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-cavs-debuginfo-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • openssh-cavs-debuginfo-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • openssh-cavs-debuginfo-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-cavs-debuginfo-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • openssh-clients-0:8.0p1-20.el8_8.4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-clients-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • openssh-clients-0:8.0p1-20.el8_8.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • +54 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

🔗 References (8)