# RHSA-2026:33577: Security update for 28 packages RHSA-2026:33577, released July 1, 2026, fixes 3 CVEs across 28 products. None of them is reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/fix/linux/rhsa-2026-33577 - Platform: Linux - Released: Jul 1, 2026 - Priority: High (Closes CVE-2026-42258, high severity) - CVEs: 3, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://access.redhat.com/errata/RHSA-2026:33577 ## Applies to | Product | Release | Fixed in | |---|---|---| | [ruby](https://patchblox.com/security/data/product/linux/ruby.md) | RHEL 9 | 0:4.0.3-33.module+el9.8.0+24428+77f1d00a | | [ruby-bundled-gems](https://patchblox.com/security/data/product/linux/ruby-bundled-gems.md) | RHEL 9 | 0:4.0.3-33.module+el9.8.0+24428+77f1d00a | | [ruby-default-gems](https://patchblox.com/security/data/product/linux/ruby-default-gems.md) | RHEL 9 | 0:4.0.3-33.module+el9.8.0+24428+77f1d00a | | [ruby-devel](https://patchblox.com/security/data/product/linux/ruby-devel.md) | RHEL 9 | 0:4.0.3-33.module+el9.8.0+24428+77f1d00a | | [ruby-doc](https://patchblox.com/security/data/product/linux/ruby-doc.md) | RHEL 9 | 0:4.0.3-33.module+el9.8.0+24428+77f1d00a | | [ruby-libs](https://patchblox.com/security/data/product/linux/ruby-libs.md) | RHEL 9 | 0:4.0.3-33.module+el9.8.0+24428+77f1d00a | | [rubygem-bigdecimal](https://patchblox.com/security/data/product/linux/rubygem-bigdecimal.md) | RHEL 9 | 0:4.0.1-33.module+el9.8.0+24428+77f1d00a | | [rubygem-bundler](https://patchblox.com/security/data/product/linux/rubygem-bundler.md) | RHEL 9 | 0:4.0.6-33.module+el9.8.0+24428+77f1d00a | | [rubygem-io-console](https://patchblox.com/security/data/product/linux/rubygem-io-console.md) | RHEL 9 | 0:0.8.2-33.module+el9.8.0+24428+77f1d00a | | [rubygem-irb](https://patchblox.com/security/data/product/linux/rubygem-irb.md) | RHEL 9 | 0:1.16.0-33.module+el9.8.0+24428+77f1d00a | | [rubygem-json](https://patchblox.com/security/data/product/linux/rubygem-json.md) | RHEL 9 | 0:2.18.0-33.module+el9.8.0+24428+77f1d00a | | [rubygem-minitest](https://patchblox.com/security/data/product/linux/rubygem-minitest.md) | RHEL 9 | 0:6.0.0-33.module+el9.8.0+24428+77f1d00a | | [rubygem-mysql2](https://patchblox.com/security/data/product/linux/rubygem-mysql2.md) | RHEL 9 | 0:0.5.7-1.module+el9.8.0+24428+77f1d00a | | [rubygem-mysql2-doc](https://patchblox.com/security/data/product/linux/rubygem-mysql2-doc.md) | RHEL 9 | 0:0.5.7-1.module+el9.8.0+24428+77f1d00a | | [rubygem-pg](https://patchblox.com/security/data/product/linux/rubygem-pg.md) | RHEL 9 | 0:1.6.3-1.module+el9.8.0+24428+77f1d00a | | [rubygem-pg-doc](https://patchblox.com/security/data/product/linux/rubygem-pg-doc.md) | RHEL 9 | 0:1.6.3-1.module+el9.8.0+24428+77f1d00a | | [rubygem-power_assert](https://patchblox.com/security/data/product/linux/rubygem-power-assert.md) | RHEL 9 | 0:3.0.1-33.module+el9.8.0+24428+77f1d00a | | [rubygem-psych](https://patchblox.com/security/data/product/linux/rubygem-psych.md) | RHEL 9 | 0:5.3.1-33.module+el9.8.0+24428+77f1d00a | | [rubygem-racc](https://patchblox.com/security/data/product/linux/rubygem-racc.md) | RHEL 9 | 0:1.8.1-33.module+el9.8.0+24428+77f1d00a | | [rubygem-rake](https://patchblox.com/security/data/product/linux/rubygem-rake.md) | RHEL 9 | 0:13.3.1-33.module+el9.8.0+24428+77f1d00a | | [rubygem-rbs](https://patchblox.com/security/data/product/linux/rubygem-rbs.md) | RHEL 9 | 0:3.10.0-33.module+el9.8.0+24428+77f1d00a | | [rubygem-rdoc](https://patchblox.com/security/data/product/linux/rubygem-rdoc.md) | RHEL 9 | 0:7.0.3-33.module+el9.8.0+24428+77f1d00a | | [rubygem-rexml](https://patchblox.com/security/data/product/linux/rubygem-rexml.md) | RHEL 9 | 0:3.4.4-33.module+el9.8.0+24428+77f1d00a | | [rubygem-rss](https://patchblox.com/security/data/product/linux/rubygem-rss.md) | RHEL 9 | 0:0.3.2-33.module+el9.8.0+24428+77f1d00a | | [rubygem-test-unit](https://patchblox.com/security/data/product/linux/rubygem-test-unit.md) | RHEL 9 | 0:3.7.5-33.module+el9.8.0+24428+77f1d00a | | [rubygem-typeprof](https://patchblox.com/security/data/product/linux/rubygem-typeprof.md) | RHEL 9 | 0:0.31.1-33.module+el9.8.0+24428+77f1d00a | | [rubygems](https://patchblox.com/security/data/product/linux/rubygems.md) | RHEL 9 | 0:4.0.6-33.module+el9.8.0+24428+77f1d00a | | [rubygems-devel](https://patchblox.com/security/data/product/linux/rubygems-devel.md) | RHEL 9 | 0:4.0.6-33.module+el9.8.0+24428+77f1d00a | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-42258](https://patchblox.com/security/data/cve/CVE-2026-42258.md) | High | net-imap: Command Injection via unvalidated Symbol inputs | 7.4 | 0.0078 | | | [CVE-2026-42245](https://patchblox.com/security/data/cve/CVE-2026-42245.md) | High | ruby4.0: Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby | 7.4 | 0.0041 | | | [CVE-2026-42246](https://patchblox.com/security/data/cve/CVE-2026-42246.md) | High | net-imap vulnerable to STARTTLS stripping via invalid response timing | 7.4 | 0.0031 | | --- Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo