- Issued:
- 2026-08-11
- Updated:
- 2026-08-11
RHSA-2026:53374 - Security Advisory
Synopsis
Important: rhc security update
Type/Severity
Security Advisory: Important
Red Hat Lightspeed patch analysis
Identify and remediate systems affected by this advisory.
Topic
An update for rhc is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.
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
rhc is a client tool and daemon that connects the system to Red Hat hosted services enabling system and subscription management.
Security Fix(es):
- golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821)
- crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries (CVE-2026-27145)
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:
Affected Products
- Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0 x86_64
- Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.0 s390x
- Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.0 ppc64le
- Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.0 aarch64
- Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.0 aarch64
- Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.0 s390x
- Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.0 ppc64le
- Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.0 x86_64
Fixes
- BZ - 2480756 - CVE-2026-39821 golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing
- BZ - 2484207 - CVE-2026-27145 crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries
Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0
| SRPM | |
|---|---|
| rhc-0.3.2-5.el10_0.src.rpm | SHA-256: dbc31b66269c46806a0cb74782947427d39b9e73ab535903edeaf744942f49dc |
| x86_64 | |
| rhc-0.3.2-5.el10_0.x86_64.rpm | SHA-256: 91347ceb168a1db431f1b5c3f0cc99de553c24625b950f6e2168e301321a124d |
| rhc-debuginfo-0.3.2-5.el10_0.x86_64.rpm | SHA-256: 40b702b93dc0118738725477526df0d1e79ca79e4d519cf05c00c5ffe19ac940 |
| rhc-debugsource-0.3.2-5.el10_0.x86_64.rpm | SHA-256: 349362367cd19609c828584ae65b5a7c42c45f1047469511c8c6e9f0ceb6c73e |
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.0
| SRPM | |
|---|---|
| rhc-0.3.2-5.el10_0.src.rpm | SHA-256: dbc31b66269c46806a0cb74782947427d39b9e73ab535903edeaf744942f49dc |
| s390x | |
| rhc-0.3.2-5.el10_0.s390x.rpm | SHA-256: 2bf2c470208b5472b248ac4525b3676a99d09c22cf8d3ff437e15d0c8d7bc5ee |
| rhc-debuginfo-0.3.2-5.el10_0.s390x.rpm | SHA-256: 9b6d53bd9c63dd692d0ba9da2f91ffe14803068100503187454467c82ead69fa |
| rhc-debugsource-0.3.2-5.el10_0.s390x.rpm | SHA-256: 34fa5de84fafeaec26f152a74a9471fa2af9f2295b894e6f7110005bf6c95e4c |
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.0
| SRPM | |
|---|---|
| rhc-0.3.2-5.el10_0.src.rpm | SHA-256: dbc31b66269c46806a0cb74782947427d39b9e73ab535903edeaf744942f49dc |
| ppc64le | |
| rhc-0.3.2-5.el10_0.ppc64le.rpm | SHA-256: 289433a26ae5b81cacf7450ff705a8af62d69c1194cdac2481df0c3955281723 |
| rhc-debuginfo-0.3.2-5.el10_0.ppc64le.rpm | SHA-256: 52e32abf516624bd3349b57a184b33da85c2fe994ae2d21b36be5f614f151a6e |
| rhc-debugsource-0.3.2-5.el10_0.ppc64le.rpm | SHA-256: 2b5589d972e111ced7496b2dbb0358e06d0351ea4ce03fc57a6ac01230673f80 |
Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.0
| SRPM | |
|---|---|
| rhc-0.3.2-5.el10_0.src.rpm | SHA-256: dbc31b66269c46806a0cb74782947427d39b9e73ab535903edeaf744942f49dc |
| aarch64 | |
| rhc-0.3.2-5.el10_0.aarch64.rpm | SHA-256: 9e51063f97f7e8e908fea1a70a9116a3f6dc802ba1a78d0e3143e57c52f45699 |
| rhc-debuginfo-0.3.2-5.el10_0.aarch64.rpm | SHA-256: d1dab6f3b0ac3913f2532e5387035c9e19930135406c7434280956f7ffce7bc6 |
| rhc-debugsource-0.3.2-5.el10_0.aarch64.rpm | SHA-256: 5193c4dcf7221e31e74aeb1744acfb7a567ab737c4dbdc222ef8915bd0c741ba |
Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.0
| SRPM | |
|---|---|
| rhc-0.3.2-5.el10_0.src.rpm | SHA-256: dbc31b66269c46806a0cb74782947427d39b9e73ab535903edeaf744942f49dc |
| aarch64 | |
| rhc-0.3.2-5.el10_0.aarch64.rpm | SHA-256: 9e51063f97f7e8e908fea1a70a9116a3f6dc802ba1a78d0e3143e57c52f45699 |
| rhc-debuginfo-0.3.2-5.el10_0.aarch64.rpm | SHA-256: d1dab6f3b0ac3913f2532e5387035c9e19930135406c7434280956f7ffce7bc6 |
| rhc-debugsource-0.3.2-5.el10_0.aarch64.rpm | SHA-256: 5193c4dcf7221e31e74aeb1744acfb7a567ab737c4dbdc222ef8915bd0c741ba |
Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.0
| SRPM | |
|---|---|
| rhc-0.3.2-5.el10_0.src.rpm | SHA-256: dbc31b66269c46806a0cb74782947427d39b9e73ab535903edeaf744942f49dc |
| s390x | |
| rhc-0.3.2-5.el10_0.s390x.rpm | SHA-256: 2bf2c470208b5472b248ac4525b3676a99d09c22cf8d3ff437e15d0c8d7bc5ee |
| rhc-debuginfo-0.3.2-5.el10_0.s390x.rpm | SHA-256: 9b6d53bd9c63dd692d0ba9da2f91ffe14803068100503187454467c82ead69fa |
| rhc-debugsource-0.3.2-5.el10_0.s390x.rpm | SHA-256: 34fa5de84fafeaec26f152a74a9471fa2af9f2295b894e6f7110005bf6c95e4c |
Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.0
| SRPM | |
|---|---|
| rhc-0.3.2-5.el10_0.src.rpm | SHA-256: dbc31b66269c46806a0cb74782947427d39b9e73ab535903edeaf744942f49dc |
| ppc64le | |
| rhc-0.3.2-5.el10_0.ppc64le.rpm | SHA-256: 289433a26ae5b81cacf7450ff705a8af62d69c1194cdac2481df0c3955281723 |
| rhc-debuginfo-0.3.2-5.el10_0.ppc64le.rpm | SHA-256: 52e32abf516624bd3349b57a184b33da85c2fe994ae2d21b36be5f614f151a6e |
| rhc-debugsource-0.3.2-5.el10_0.ppc64le.rpm | SHA-256: 2b5589d972e111ced7496b2dbb0358e06d0351ea4ce03fc57a6ac01230673f80 |
Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.0
| SRPM | |
|---|---|
| rhc-0.3.2-5.el10_0.src.rpm | SHA-256: dbc31b66269c46806a0cb74782947427d39b9e73ab535903edeaf744942f49dc |
| x86_64 | |
| rhc-0.3.2-5.el10_0.x86_64.rpm | SHA-256: 91347ceb168a1db431f1b5c3f0cc99de553c24625b950f6e2168e301321a124d |
| rhc-debuginfo-0.3.2-5.el10_0.x86_64.rpm | SHA-256: 40b702b93dc0118738725477526df0d1e79ca79e4d519cf05c00c5ffe19ac940 |
| rhc-debugsource-0.3.2-5.el10_0.x86_64.rpm | SHA-256: 349362367cd19609c828584ae65b5a7c42c45f1047469511c8c6e9f0ceb6c73e |
The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/