Amazon Linux 2 Security Advisory: ALAS2-2026-3794
Advisory Released Date: 2026-07-08
Advisory Updated Date: 2026-07-08
Severity:
Important
Issue Overview:
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4. (CVE-2026-42246)
Affected Packages:
ruby
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update ruby or yum update --advisory ALAS2-2026-3794 to update your system.
New Packages:
aarch64:
ruby-2.0.0.648-36.amzn2.0.20.aarch64
ruby-devel-2.0.0.648-36.amzn2.0.20.aarch64
ruby-libs-2.0.0.648-36.amzn2.0.20.aarch64
rubygem-bigdecimal-1.2.0-36.amzn2.0.20.aarch64
rubygem-io-console-0.4.2-36.amzn2.0.20.aarch64
rubygem-json-1.7.7-36.amzn2.0.20.aarch64
rubygem-psych-2.0.0-36.amzn2.0.20.aarch64
ruby-tcltk-2.0.0.648-36.amzn2.0.20.aarch64
ruby-debuginfo-2.0.0.648-36.amzn2.0.20.aarch64
i686:
ruby-2.0.0.648-36.amzn2.0.20.i686
ruby-devel-2.0.0.648-36.amzn2.0.20.i686
ruby-libs-2.0.0.648-36.amzn2.0.20.i686
rubygem-bigdecimal-1.2.0-36.amzn2.0.20.i686
rubygem-io-console-0.4.2-36.amzn2.0.20.i686
rubygem-json-1.7.7-36.amzn2.0.20.i686
rubygem-psych-2.0.0-36.amzn2.0.20.i686
ruby-tcltk-2.0.0.648-36.amzn2.0.20.i686
ruby-debuginfo-2.0.0.648-36.amzn2.0.20.i686
noarch:
rubygems-2.0.14.1-36.amzn2.0.20.noarch
rubygems-devel-2.0.14.1-36.amzn2.0.20.noarch
rubygem-rake-0.9.6-36.amzn2.0.20.noarch
ruby-irb-2.0.0.648-36.amzn2.0.20.noarch
rubygem-rdoc-4.0.0-36.amzn2.0.20.noarch
ruby-doc-2.0.0.648-36.amzn2.0.20.noarch
rubygem-minitest-4.3.2-36.amzn2.0.20.noarch
src:
ruby-2.0.0.648-36.amzn2.0.20.src
x86_64:
ruby-2.0.0.648-36.amzn2.0.20.x86_64
ruby-devel-2.0.0.648-36.amzn2.0.20.x86_64
ruby-libs-2.0.0.648-36.amzn2.0.20.x86_64
rubygem-bigdecimal-1.2.0-36.amzn2.0.20.x86_64
rubygem-io-console-0.4.2-36.amzn2.0.20.x86_64
rubygem-json-1.7.7-36.amzn2.0.20.x86_64
rubygem-psych-2.0.0-36.amzn2.0.20.x86_64
ruby-tcltk-2.0.0.648-36.amzn2.0.20.x86_64
ruby-debuginfo-2.0.0.648-36.amzn2.0.20.x86_64