Issued:
2026-07-29
Updated:
2026-07-29

RHSA-2026:47757 - Important: openssh security update

Synopsis

Important: openssh security update

Type/Severity

Security Advisory: Important

Topic

An update for openssh is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server.

Security Fix(es):

  • openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in Red Hat Enterprise Linux OpenSSH client versions (CVE-2026-55655)

  • openssh: Double free in Red Hat Enterprise Linux versions of OpenSSH DH-GEX client path during FIPS known-group validation leads to client-side denial of service (CVE-2026-55653)

  • openssh: Heap out-of-bounds read in Red Hat Enterprise Linux versions of OpenSSH GSSAPI indicator cleanup due to missing NULL sentinel termination (CVE-2026-55654)

  • openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side (CVE-2026-60002)

  • openssh: OpenSSH: scp file misplacement vulnerability during remote copy (CVE-2026-59996)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_6410x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support10.2x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle10.2x86_64
Red Hat Enterprise Linux for x86_64 - 4 years of updates10.2x86_64
Red Hat Enterprise Linux for Power, little endian10ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support10.2ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle10.2ppc64le
Red Hat Enterprise Linux for Power, little endian - 4 years of support10.2ppc64le
Red Hat Enterprise Linux for IBM z Systems10s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support10.2s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle10.2s390x
Red Hat Enterprise Linux for IBM z Systems - 4 years of updates10.2s390x
Red Hat Enterprise Linux for ARM 6410aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support10.2aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle10.2aarch64
Red Hat Enterprise Linux for ARM 64 - 4 years of updates10.2aarch64

Updated Packages

  • openssh-keysign-9.9p1-25.el10_2.aarch64.rpm
  • openssh-keycat-debuginfo-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-keycat-9.9p1-25.el10_2.aarch64.rpm
  • openssh-clients-9.9p1-25.el10_2.aarch64.rpm
  • openssh-clients-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-keycat-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-askpass-debuginfo-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-server-9.9p1-25.el10_2.s390x.rpm
  • openssh-server-debuginfo-9.9p1-25.el10_2.x86_64.rpm
  • openssh-keysign-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-askpass-9.9p1-25.el10_2.x86_64.rpm
  • openssh-clients-debuginfo-9.9p1-25.el10_2.s390x.rpm
  • openssh-server-debuginfo-9.9p1-25.el10_2.aarch64.rpm
  • openssh-askpass-9.9p1-25.el10_2.aarch64.rpm
  • openssh-keycat-9.9p1-25.el10_2.x86_64.rpm
  • openssh-askpass-debuginfo-9.9p1-25.el10_2.s390x.rpm
  • openssh-keycat-debuginfo-9.9p1-25.el10_2.x86_64.rpm
  • openssh-debuginfo-9.9p1-25.el10_2.aarch64.rpm
  • openssh-keysign-debuginfo-9.9p1-25.el10_2.x86_64.rpm
  • openssh-debugsource-9.9p1-25.el10_2.s390x.rpm
  • openssh-9.9p1-25.el10_2.s390x.rpm
  • openssh-sk-dummy-debuginfo-9.9p1-25.el10_2.x86_64.rpm
  • openssh-sk-dummy-debuginfo-9.9p1-25.el10_2.s390x.rpm
  • openssh-keysign-9.9p1-25.el10_2.x86_64.rpm
  • openssh-keysign-9.9p1-25.el10_2.s390x.rpm
  • openssh-askpass-debuginfo-9.9p1-25.el10_2.x86_64.rpm
  • openssh-debugsource-9.9p1-25.el10_2.aarch64.rpm
  • openssh-askpass-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-clients-debuginfo-9.9p1-25.el10_2.x86_64.rpm
  • openssh-debugsource-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-sk-dummy-debuginfo-9.9p1-25.el10_2.aarch64.rpm
  • openssh-server-9.9p1-25.el10_2.x86_64.rpm
  • openssh-server-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-clients-9.9p1-25.el10_2.s390x.rpm
  • openssh-debuginfo-9.9p1-25.el10_2.s390x.rpm
  • openssh-keysign-debuginfo-9.9p1-25.el10_2.aarch64.rpm
  • openssh-sk-dummy-debuginfo-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-server-9.9p1-25.el10_2.aarch64.rpm
  • openssh-9.9p1-25.el10_2.aarch64.rpm
  • openssh-server-debuginfo-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-clients-9.9p1-25.el10_2.x86_64.rpm
  • openssh-clients-debuginfo-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-9.9p1-25.el10_2.src.rpm
  • openssh-9.9p1-25.el10_2.x86_64.rpm
  • openssh-clients-debuginfo-9.9p1-25.el10_2.aarch64.rpm
  • openssh-debuginfo-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-keycat-9.9p1-25.el10_2.s390x.rpm
  • openssh-askpass-debuginfo-9.9p1-25.el10_2.aarch64.rpm
  • openssh-debuginfo-9.9p1-25.el10_2.x86_64.rpm
  • openssh-debugsource-9.9p1-25.el10_2.x86_64.rpm
  • openssh-keysign-debuginfo-9.9p1-25.el10_2.s390x.rpm
  • openssh-keycat-debuginfo-9.9p1-25.el10_2.aarch64.rpm
  • openssh-keycat-debuginfo-9.9p1-25.el10_2.s390x.rpm
  • openssh-keysign-debuginfo-9.9p1-25.el10_2.ppc64le.rpm
  • openssh-server-debuginfo-9.9p1-25.el10_2.s390x.rpm
  • openssh-askpass-9.9p1-25.el10_2.s390x.rpm

Fixes

CVEs

References

Additional information