Amazon Linux 2 Security Advisory: ALAS2-2026-3357
Advisory Released Date: 2026-06-22
Advisory Updated Date: 2026-06-22
HTML::Entities versions before 3.84 for Perl read freed heap memory in _decode_entities.
The XS routine backing HTML::Entities::_decode_entities cached a pointer (repl) into the entity-value SV returned by hv_fetch on the entity2char hash. When the input SV was identical to a value SV in that hash, and that value contained its own key as an entity reference, a later call to grow_gap() reallocated the SV's PV buffer and freed the backing allocation that repl still pointed into. The subsequent copy loop read repl_len bytes from the freed allocation.
The read may disclose adjacent heap contents into the destination SV. (CVE-2026-8829)
Affected Packages:
perl-HTML-Parser
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 perl-HTML-Parser or yum update --advisory ALAS2-2026-3357 to update your system.
aarch64:
perl-HTML-Parser-3.71-4.amzn2.0.3.aarch64
perl-HTML-Parser-debuginfo-3.71-4.amzn2.0.3.aarch64
i686:
perl-HTML-Parser-3.71-4.amzn2.0.3.i686
perl-HTML-Parser-debuginfo-3.71-4.amzn2.0.3.i686
src:
perl-HTML-Parser-3.71-4.amzn2.0.3.src
x86_64:
perl-HTML-Parser-3.71-4.amzn2.0.3.x86_64
perl-HTML-Parser-debuginfo-3.71-4.amzn2.0.3.x86_64