This security update addresses three high-severity Denial of Service vulnerabilities (CVE-2026-32280, CVE-2026-32281, CVE-2026-32283, CVSS 7.5) in the Go programming language's `crypto/x509` and `crypto/tls` packages, which are used by the Delve debugger. The vulnerabilities involve inefficient certificate chain validation and handling of multiple TLS 1.3 key update messages. Affected Go versions are prior to 1.25.9 and versions 1.26.0 through 1.26.1, requiring an upgrade to Go 1.25.9 or 1.26.2, which is included in this Red Hat Enterprise Linux 10 update for the Delve package.
Red Hat Product Errata RHSA-2026:23102 - Security Advisory Issued: 2026-06-04 Updated: 2026-06-04 RHSA-2026:23102 - Security Advisory Overview Updated Packages Synopsis Important: delve security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for delve 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 Delve is a debugger for the Go programming language. The goal of the project is to provide a simple, full featured debugging tool for Go. Delve should be easy to invoke and easy to use. Chances are if you're using a debugger, things aren't going your way. With that in mind, Delve should stay out of your way as much as possible. Security Fix(es): crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281) crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283) crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280) 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 Red Hat Enterprise Linux for x86_64 10 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 x86_64 Red Hat Enterprise Linux for Power, little endian 10 ppc64le Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le Red Hat Enterprise Linux for ARM 64 10 aarch64 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 aarch64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 aarch64 Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 ppc64le Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 ppc64le Fixes BZ - 2456333 - CVE-2026-32281 crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation BZ - 2456338 - CVE-2026-32283 crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages BZ - 2456339 - CVE-2026-32280 crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building CVEs CVE-2026-32280 CVE-2026-32281 CVE-2026-32283 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 10 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 x86_64 delve-1.26.1-2.el10_2.x86_64.rpm SHA-256: 7e1a4940b4e32809f3eac2fbb5ce8516b0007e8413a6eb93b0cf45977877c0b7 delve-debuginfo-1.26.1-2.el10_2.x86_64.rpm SHA-256: eb5b3c69960db5211b5b48bb33045577961329abd8e93a0041f69a43c714247e delve-debugsource-1.26.1-2.el10_2.x86_64.rpm SHA-256: 8a3e4232aa767b7be0e8032337e38b965c0f9be92881b759f9588bc78a8404c9 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 x86_64 delve-1.26.1-2.el10_2.x86_64.rpm SHA-256: 7e1a4940b4e32809f3eac2fbb5ce8516b0007e8413a6eb93b0cf45977877c0b7 delve-debuginfo-1.26.1-2.el10_2.x86_64.rpm SHA-256: eb5b3c69960db5211b5b48bb33045577961329abd8e93a0041f69a43c714247e delve-debugsource-1.26.1-2.el10_2.x86_64.rpm SHA-256: 8a3e4232aa767b7be0e8032337e38b965c0f9be92881b759f9588bc78a8404c9 Red Hat Enterprise Linux for Power, little endian 10 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 ppc64le delve-1.26.1-2.el10_2.ppc64le.rpm SHA-256: ac098a5b5bc38e511dea09908e7fd4439e21c06d14a00a742c408a25fae7b2dd delve-debuginfo-1.26.1-2.el10_2.ppc64le.rpm SHA-256: 5009e18b586dbd41c85cddfc5346c9defc8aaacdb31a8824f66ac54cfce3e455 delve-debugsource-1.26.1-2.el10_2.ppc64le.rpm SHA-256: b2d8efb32429f2410b403ab964de0180d0c0697d920995275b24c3389f89d973 Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 ppc64le delve-1.26.1-2.el10_2.ppc64le.rpm SHA-256: ac098a5b5bc38e511dea09908e7fd4439e21c06d14a00a742c408a25fae7b2dd delve-debuginfo-1.26.1-2.el10_2.ppc64le.rpm SHA-256: 5009e18b586dbd41c85cddfc5346c9defc8aaacdb31a8824f66ac54cfce3e455 delve-debugsource-1.26.1-2.el10_2.ppc64le.rpm SHA-256: b2d8efb32429f2410b403ab964de0180d0c0697d920995275b24c3389f89d973 Red Hat Enterprise Linux for ARM 64 10 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 aarch64 delve-1.26.1-2.el10_2.aarch64.rpm SHA-256: 1d3a01b2653ac81864e3a6f18fbd8ce5852ea6ee6e769585cc6166ff0cdd552b delve-debuginfo-1.26.1-2.el10_2.aarch64.rpm SHA-256: fb48b0ced36e9836d983fe54446e36d3764e50fb3b29c2e6220658700d7e456f delve-debugsource-1.26.1-2.el10_2.aarch64.rpm SHA-256: dfd1f37f34f954edb90b0904cca5dc8d61ea4d17298965ca1b73827c8cc0e651 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 aarch64 delve-1.26.1-2.el10_2.aarch64.rpm SHA-256: 1d3a01b2653ac81864e3a6f18fbd8ce5852ea6ee6e769585cc6166ff0cdd552b delve-debuginfo-1.26.1-2.el10_2.aarch64.rpm SHA-256: fb48b0ced36e9836d983fe54446e36d3764e50fb3b29c2e6220658700d7e456f delve-debugsource-1.26.1-2.el10_2.aarch64.rpm SHA-256: dfd1f37f34f954edb90b0904cca5dc8d61ea4d17298965ca1b73827c8cc0e651 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 aarch64 delve-1.26.1-2.el10_2.aarch64.rpm SHA-256: 1d3a01b2653ac81864e3a6f18fbd8ce5852ea6ee6e769585cc6166ff0cdd552b delve-debuginfo-1.26.1-2.el10_2.aarch64.rpm SHA-256: fb48b0ced36e9836d983fe54446e36d3764e50fb3b29c2e6220658700d7e456f delve-debugsource-1.26.1-2.el10_2.aarch64.rpm SHA-256: dfd1f37f34f954edb90b0904cca5dc8d61ea4d17298965ca1b73827c8cc0e651 Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 ppc64le delve-1.26.1-2.el10_2.ppc64le.rpm SHA-256: ac098a5b5bc38e511dea09908e7fd4439e21c06d14a00a742c408a25fae7b2dd delve-debuginfo-1.26.1-2.el10_2.ppc64le.rpm SHA-256: 5009e18b586dbd41c85cddfc5346c9defc8aaacdb31a8824f66ac54cfce3e455 delve-debugsource-1.26.1-2.el10_2.ppc64le.rpm SHA-256: b2d8efb32429f2410b403ab964de0180d0c0697d920995275b24c3389f89d973 Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 x86_64 delve-1.26.1-2.el10_2.x86_64.rpm SHA-256: 7e1a4940b4e32809f3eac2fbb5ce8516b0007e8413a6eb93b0cf45977877c0b7 delve-debuginfo-1.26.1-2.el10_2.x86_64.rpm SHA-256: eb5b3c69960db5211b5b48bb33045577961329abd8e93a0041f69a43c714247e delve-debugsource-1.26.1-2.el10_2.x86_64.rpm SHA-256: 8a3e4232aa767b7be0e8032337e38b965c0f9be92881b759f9588bc78a8404c9 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 x86_64 delve-1.26.1-2.el10_2.x86_64.rpm SHA-256: 7e1a4940b4e32809f3eac2fbb5ce8516b0007e8413a6eb93b0cf45977877c0b7 delve-debuginfo-1.26.1-2.el10_2.x86_64.rpm SHA-256: eb5b3c69960db5211b5b48bb33045577961329abd8e93a0041f69a43c714247e delve-debugsource-1.26.1-2.el10_2.x86_64.rpm SHA-256: 8a3e4232aa767b7be0e8032337e38b965c0f9be92881b759f9588bc78a8404c9 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 aarch64 delve-1.26.1-2.el10_2.aarch64.rpm SHA-256: 1d3a01b2653ac81864e3a6f18fbd8ce5852ea6ee6e769585cc6166ff0cdd552b delve-debuginfo-1.26.1-2.el10_2.aarch64.rpm SHA-256: fb48b0ced36e9836d983fe54446e36d3764e50fb3b29c2e6220658700d7e456f delve-debugsource-1.26.1-2.el10_2.aarch64.rpm SHA-256: dfd1f37f34f954edb90b0904cca5dc8d61ea4d17298965ca1b73827c8cc0e651 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 SRPM delve-1.26.1-2.el10_2.src.rpm SHA-256: a099f3f487558ab7ac959461554b05358b3fe0513954f32a82238f4ee9091707 ppc64le delve-1.26.1-2.el10_2.ppc64le.rpm SHA-256: ac098a5b5bc38e511dea09908e7fd4439e21c06d14a00a742c408a25fae7b2dd delve-debuginfo-1.26.1-2.el10_2.ppc64le.rpm SHA-256: 5009e18b586dbd41c85cddfc5346c9defc8aaacdb31a8824f66ac54cfce3e455 delve-debugsource-1.26.1-2.el10_2.ppc64le.rpm SHA-256: b2d8efb32429f2410b403ab964de0180d0c0697d920995275b24c3389f89d973 The Red Hat security contact is secalert@redhat.com . 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