Amazon Linux 2 Security Advisory: ALAS2-2025-2990
Advisory Released Date: 2025-09-04
Advisory Updated Date: 2025-09-04
Severity:
Medium
Issue Overview:
An exploitable heap overflow vulnerability exists in the Psych::Emitter start_document function of Ruby. In Psych::Emitter start_document function heap buffer "head" allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow. (CVE-2016-2338)
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 ALAS2-2025-2990 to update your system.
New Packages:
aarch64:
ruby-2.0.0.648-36.amzn2.0.17.aarch64
ruby-devel-2.0.0.648-36.amzn2.0.17.aarch64
ruby-libs-2.0.0.648-36.amzn2.0.17.aarch64
rubygem-bigdecimal-1.2.0-36.amzn2.0.17.aarch64
rubygem-io-console-0.4.2-36.amzn2.0.17.aarch64
rubygem-json-1.7.7-36.amzn2.0.17.aarch64
rubygem-psych-2.0.0-36.amzn2.0.17.aarch64
ruby-tcltk-2.0.0.648-36.amzn2.0.17.aarch64
ruby-debuginfo-2.0.0.648-36.amzn2.0.17.aarch64
i686:
ruby-2.0.0.648-36.amzn2.0.17.i686
ruby-devel-2.0.0.648-36.amzn2.0.17.i686
ruby-libs-2.0.0.648-36.amzn2.0.17.i686
rubygem-bigdecimal-1.2.0-36.amzn2.0.17.i686
rubygem-io-console-0.4.2-36.amzn2.0.17.i686
rubygem-json-1.7.7-36.amzn2.0.17.i686
rubygem-psych-2.0.0-36.amzn2.0.17.i686
ruby-tcltk-2.0.0.648-36.amzn2.0.17.i686
ruby-debuginfo-2.0.0.648-36.amzn2.0.17.i686
noarch:
rubygems-2.0.14.1-36.amzn2.0.17.noarch
rubygems-devel-2.0.14.1-36.amzn2.0.17.noarch
rubygem-rake-0.9.6-36.amzn2.0.17.noarch
ruby-irb-2.0.0.648-36.amzn2.0.17.noarch
rubygem-rdoc-4.0.0-36.amzn2.0.17.noarch
ruby-doc-2.0.0.648-36.amzn2.0.17.noarch
rubygem-minitest-4.3.2-36.amzn2.0.17.noarch
src:
ruby-2.0.0.648-36.amzn2.0.17.src
x86_64:
ruby-2.0.0.648-36.amzn2.0.17.x86_64
ruby-devel-2.0.0.648-36.amzn2.0.17.x86_64
ruby-libs-2.0.0.648-36.amzn2.0.17.x86_64
rubygem-bigdecimal-1.2.0-36.amzn2.0.17.x86_64
rubygem-io-console-0.4.2-36.amzn2.0.17.x86_64
rubygem-json-1.7.7-36.amzn2.0.17.x86_64
rubygem-psych-2.0.0-36.amzn2.0.17.x86_64
ruby-tcltk-2.0.0.648-36.amzn2.0.17.x86_64
ruby-debuginfo-2.0.0.648-36.amzn2.0.17.x86_64