Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-4031
Advisory Released Date: 2026-10-24
Advisory Updated Date: 2026-10-26
Severity:
Important
Issue Overview:
lrzsz before 0.13.0 contains an OS command injection vulnerability in the lrz receive utility's pipe mode that allows remote senders to execute commands by supplying crafted filenames. When lrz runs under a suffixed name such as lrztar, procheader() in src/lrz.c passes the unescaped ZMODEM/YMODEM filename to popen(), so shell metacharacters execute as the receiving user. (CVE-2026-105841)
Affected Packages:
lrzsz
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 lrzsz or yum update --advisory ALAS2-2026-4031 to update your system.
New Packages:
aarch64:
lrzsz-0.12.20-36.amzn2.0.3.aarch64
lrzsz-debuginfo-0.12.20-36.amzn2.0.3.aarch64
i686:
lrzsz-0.12.20-36.amzn2.0.3.i686
lrzsz-debuginfo-0.12.20-36.amzn2.0.3.i686
src:
lrzsz-0.12.20-36.amzn2.0.3.src
x86_64:
lrzsz-0.12.20-36.amzn2.0.3.x86_64
lrzsz-debuginfo-0.12.20-36.amzn2.0.3.x86_64