Medium 2026-07-30

Openssh Security Update — AlmaLinux 8 (ALSA-2026:47755)

AlmaLinux 8

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 AlmaLinux OpenSSH clien…

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 AlmaLinux OpenSSH clien…

Type:

security

Severity:

moderate

Release date:

2026-07-30

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 AlmaLinux OpenSSH client versions (CVE-2026-55655)

  * openssh: Double free in AlmaLinux versions of OpenSSH DH-GEX client path during FIPS known-group validation leads to client-side denial of service (CVE-2026-55653)
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.

References:

Updated packages listed below:

Architecture	Package	Checksum
aarch64	openssh-server-8.0p1-30.el8_10.aarch64.rpm	10c176986ce3d78b1bcc9b514b9fad76a1ec85ac6c4f3362c048ff069c38985d
aarch64	openssh-keycat-8.0p1-30.el8_10.aarch64.rpm	689f9e59b5c119a13726c9664c40882386d81cc3f53be5b420e4f658fd294709
aarch64	openssh-cavs-8.0p1-30.el8_10.aarch64.rpm	a95a4f60610f9527565320ec8729e1fb5003ac7093a316ad6f41e207867b9a9f
aarch64	openssh-clients-8.0p1-30.el8_10.aarch64.rpm	c03542969f555bf88bbd01565f627ef7c0b7f1287a4b02aa6b8d9eb6d71625d3
aarch64	openssh-ldap-8.0p1-30.el8_10.aarch64.rpm	cfe3f392cc8bb3f7ce7bef2b035a8e7e828e03e8b464a29d11a42b44eef6df97
aarch64	pam_ssh_agent_auth-0.10.3-7.30.el8_10.aarch64.rpm	d833e2c0b526cfc50aa7fddddb9ac8854af65245d7228519447cb91b3cc9e530
aarch64	openssh-8.0p1-30.el8_10.aarch64.rpm	f2b71a52aabe73b674afbece4e753034e84d73ae4f5d25d1ee01c7775e43313c
aarch64	openssh-askpass-8.0p1-30.el8_10.aarch64.rpm	ffcbe7770474c4001aa25476d850e6143611b4dbf58954fc89e86278a8c86602
ppc64le	pam_ssh_agent_auth-0.10.3-7.30.el8_10.ppc64le.rpm	004039539482728dd8a48cff74cb8c120c63e8bd07bf67027fd0a0ffb40a614f
ppc64le	openssh-8.0p1-30.el8_10.ppc64le.rpm	069331708020b19431fc97096afb951e2e2937f46ee58da7b4add5e0e3f8c503
ppc64le	openssh-ldap-8.0p1-30.el8_10.ppc64le.rpm	0c8716703b5b68ad047aec86b38d0c3fbec01e7eb2a79232e04bc37c3a09fa80
ppc64le	openssh-server-8.0p1-30.el8_10.ppc64le.rpm	772f11e3d88cd5319924cbfb38d3a7073110ba593978dc3e6fe9ff91aa29cf9a
ppc64le	openssh-askpass-8.0p1-30.el8_10.ppc64le.rpm	79add9d11ffd823668b4169e537d7e7cac0b840fd1b9d4189319f3e234e2e3f5
ppc64le	openssh-keycat-8.0p1-30.el8_10.ppc64le.rpm	b1a170a4678c5a9815e5bc5350796db5027ed91b52a9807e9ec39a680cd10a76
ppc64le	openssh-cavs-8.0p1-30.el8_10.ppc64le.rpm	ee7d25cfe519d2ff34bcdd9f691db96873ae5967f53fb29741b53cd7f4522992
ppc64le	openssh-clients-8.0p1-30.el8_10.ppc64le.rpm	fa1133a6d9c9c54907249a1788b992ce049f324ffc6237585739bb9db3bf9960
s390x	openssh-askpass-8.0p1-30.el8_10.s390x.rpm	078ce3b9942fa9fe1868a553be6241b54f6bf685a2f465b53fdb2fee83a1ec70
s390x	openssh-cavs-8.0p1-30.el8_10.s390x.rpm	5b90fcad38c5017f5604d920a13d414438eea23c9c17d1a679b0435ea681cce7
s390x	openssh-keycat-8.0p1-30.el8_10.s390x.rpm	5fac9f606f8ca67a05c757cfc34d1e319dd8e99c7f80440861bc5aa4474e886b
s390x	openssh-server-8.0p1-30.el8_10.s390x.rpm	66b5ab11cb1b9dc57fff770004e6ae9e522ddc419d1a9bb876d9cb5c2b6b1a93
s390x	openssh-clients-8.0p1-30.el8_10.s390x.rpm	8077d998b7a40a979e4bb4f2a80dcad03f48259b90cd8dd9ae4f0b43f22b8b83
s390x	openssh-ldap-8.0p1-30.el8_10.s390x.rpm	b2a5e3d1dea80c16fa2bbcb14dd7d08a0b2a32b9ed6e22fb43e2c5420b4ff1c0
s390x	pam_ssh_agent_auth-0.10.3-7.30.el8_10.s390x.rpm	d37a443f4f4ba11ec52585b735fc199e41470378d40a33585737a4a14d1245f3
s390x	openssh-8.0p1-30.el8_10.s390x.rpm	e588b9d1c367501b3f5501f33912ffcdf40d18e3b1869ab33ccbcdd9bbcfe4e7
x86_64	openssh-8.0p1-30.el8_10.x86_64.rpm	1ebb59bfd9e4758bbd6542cceafc89cee6b7485c98a935390b82da571939fad8
x86_64	openssh-askpass-8.0p1-30.el8_10.x86_64.rpm	32511ae0ccfee60a50138afbea0272e5f6b4ed40d58000752c4388663aa2fd74
x86_64	openssh-cavs-8.0p1-30.el8_10.x86_64.rpm	6b562e94f177db130156d9c014c0d8882bf8a8ff5694c01d6756894c22f7ca4c
x86_64	openssh-keycat-8.0p1-30.el8_10.x86_64.rpm	92ecfbcefa89931f38c852fca16fee85afb8e1d94694cb4b054cd68567638076
x86_64	pam_ssh_agent_auth-0.10.3-7.30.el8_10.x86_64.rpm	b5cc4748f8dac8924310980bffdba5ee436b6a4db2344c476e5e85da07b4af05
x86_64	openssh-server-8.0p1-30.el8_10.x86_64.rpm	b7d9a2b26c00433fdfa83da45645d16de8b3be4807e895c3380494668d77d8fa
x86_64	openssh-clients-8.0p1-30.el8_10.x86_64.rpm	b8f69fcf1df5755dd76369632c4178ad5438a6ac699a7d76caa9d44107155b77
x86_64	openssh-ldap-8.0p1-30.el8_10.x86_64.rpm	d33b43931346b10a54fb391ddf2eea87c4a37aef1a722892b77bfd07664b62cb

Notes:

This page is generated automatically from Red Hat security data and has not been checked for errors. For clarification or corrections please contact the AlmaLinux Packaging Team.

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