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Red Hat released Important security updates for Go packages across Red Hat Enterprise Linux 8, 9, and 10 to fix multiple vulnerabilities, led by CVE-2025-61728, a denial-of-service flaw in Go's archive/zip component. The bug stems from a super-linear file-name indexing algorithm that runs when a file in a ZIP archive is first opened, allowing a crafted archive to trigger excessive CPU consumption and make affected applications unavailable. Red Hat said the issue was addressed broadly across standard, Extended Update Support, SAP, AUS/TUS, and Extended Life Cycle channels, as well as products including Cryostat 4 on RHEL 9 and multiple OpenShift Container Platform versions.
The advisories also remediate CVE-2025-61726 in net/url, which can cause memory exhaustion during query parsing, CVE-2025-61732 in cmd/cgo, which could enable code smuggling through doc comments, and in several RHEL 9.6, 10.0, and 10.1 channels CVE-2025-68121 in crypto/tls, involving unexpected session resumption. Updated packages include Go builds such as golang 1.25.7 for newer RHEL 9 and 10 releases, alongside backported fixes in older supported streams including RHEL 8.6 and 8.8 toolsets and RHEL 9.0, 9.2, and 9.4 channels.
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5 events from the most recent confirmed update back to the earliest known activity.
On 2026-04-30, Red Hat's Bugzilla entry 2434431 described CVE-2025-61728 as a denial-of-service flaw in Go archive/zip caused by a super-linear file name indexing algorithm, and summarized that fixes had been issued across numerous RHEL, Cryostat, and OpenShift products.
On 2026-03-02, Red Hat published RHSA-2026:3469, RHSA-2026:3471, RHSA-2026:3472, RHSA-2026:3473, and RHSA-2026:3489 to address CVE-2025-61728 in RHEL 9.4, RHEL 8.8, RHEL 9.2, RHEL 9.0, and RHEL 8.6 support and SAP-focused channels.
On 2026-02-26, Red Hat listed Cryostat 4 on RHEL 9 component cryostat/cryostat-storage-rhel9 as fixed for CVE-2025-61728 in RHSA-2026:3186. This expanded remediation beyond the previously captured core RHEL golang package advisories.
On 2026-02-24, Red Hat issued RHSA-2026:3192 and RHSA-2026:3193, providing updated golang packages that remediate CVE-2025-61728 for RHEL 10.0 Extended Update Support and multiple RHEL 9.6 offerings.
On 2026-02-16, Red Hat published RHSA-2026:2708, RHSA-2026:2709, and RHSA-2026:2706 to fix CVE-2025-61728 in Go's archive/zip, alongside related Go vulnerabilities, across Red Hat Enterprise Linux 8, 9, and 10 product lines.
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Red Hat released a broad set of **Important** security updates for Go and Go-based packages across **RHEL 8, 9, and 10**, fixing multiple vulnerabilities that include build-time arbitrary code execution, denial of service, memory corruption, certificate validation failures, and a symlink-following flaw. Core `golang` and `go-toolset:rhel8` updates moved affected platforms to fixed Go builds such as **1.25.9** variants, addressing CVEs including `CVE-2026-27140`, `CVE-2026-27143`, `CVE-2026-27144`, `CVE-2026-32280`, `CVE-2026-32282`, and `CVE-2026-32283`. Red Hat said `CVE-2026-27140` could allow **arbitrary code execution during builds** through malicious SWIG filenames containing `cgo`, a flaw it scored **CVSS 9.0**. The fixes also cascaded into Red Hat packages that embed or depend on Go components, including **osbuild-composer**, **go-fdo-client**, **go-fdo-server**, **yggdrasil**, **delve**, **gvisor-tap-vsock**, and **golang-github-openprinting-ipp-usb**. Several advisories specifically remediated Go `crypto/x509` and `crypto/tls` issues tied to certificate chain validation and building (`CVE-2026-32280`, `CVE-2026-32281`, `CVE-2026-32283`), `net/url` parsing flaws such as `CVE-2026-25679`, and the `internal/syscall/unix` `Root.Chmod` symlink issue (`CVE-2026-32282`). Updated packages were published across standard, Extended Update Support, Advanced Update Support, SAP, and Extended Life Cycle channels for x86_64, aarch64, ppc64le, and s390x systems.
Aug 20, 2026
Red Hat released multiple **Important** security advisories for `containernetworking-plugins`, `skopeo`, and `git-lfs` across RHEL 9 and RHEL 10 channels after upstream Go vulnerabilities exposed those packages to denial-of-service, memory exhaustion, and TLS validation risks. The updates address `CVE-2025-61729` in Go's `crypto/x509`, `CVE-2025-61726` in `net/url` query parsing, and `CVE-2025-68121` in `crypto/tls`; newer `containernetworking-plugins` advisories also include `CVE-2026-25679`, an IPv6 host literal parsing flaw in `net/url`. Affected product streams include RHEL 9, RHEL 9.2 SAP-related channels, RHEL 9.6 EUS and associated service variants, and RHEL 10 update channels on `x86_64`, `aarch64`, `ppc64le`, and `s390x`. Upstream Go disclosures show the most prominent issue, `CVE-2025-61729`, can drive excessive CPU use during certificate hostname verification through inefficient handling in `crypto/x509`, including repeated hostname splitting and costly string processing in verification paths such as `Certificate.Verify` and `VerifyHostname`. Red Hat shipped fixed builds including `containernetworking-plugins` `1.7.1-3.el9_7`, `1.6.2-3.el9_6`, and `1.2.0-3.el9_2.3`, `skopeo` `1.20.0-3.el10_1`, and `git-lfs` `3.6.1-2.el10_0.2`, and urged customers to apply the updates to reduce exposure in container networking and software supply chain workflows.
Aug 20, 2026
Red Hat released multiple **Important** security advisories to patch Go-related vulnerabilities across several Red Hat Enterprise Linux products, including `gvisor-tap-vsock`, `git-lfs`, `rhc`, HawtIO in the Red Hat build of Apache Camel, and the `container-tools:rhel8` module. The updates primarily address **CVE-2025-61729**, a denial-of-service flaw in Go's `crypto/x509` package that can be triggered by a crafted certificate during hostname verification, and **CVE-2025-61726**, a memory exhaustion issue in Go `net/url` query parsing. Some advisories also include fixes for **CVE-2026-25679** in `net/url`, **CVE-2024-24785** in `html/template`, and **CVE-2025-65637** in `logrus`. The underlying Go flaw tracked as **GO-2025-4155** affects `HostnameError.Error()` in `crypto/x509`, where unbounded hostname printing and repeated string concatenation can cause quadratic runtime and excessive resource consumption. Go maintainers fixed the issue in **Go 1.24.11** and **Go 1.25.5** by limiting printed hosts and replacing repeated concatenation with `strings.Builder`, and Red Hat has now shipped corresponding package updates across affected RHEL 8 and RHEL 9 channels and architectures, including updated builds such as `gvisor-tap-vsock 0.7.3-5.el9_4.3`, `git-lfs 2.13.3-3.el8_4.4`, and `rhc 0.2.1-12.el9_0`.
Aug 20, 2026