Bug 2546595 (CVE-2026-105841) - CVE-2026-105841 lrzsz: lrzsz: Arbitrary command execution via crafted file names in pipe mode
Summary: CVE-2026-105841 lrzsz: lrzsz: Arbitrary command execution via crafted file na...
Keywords:
Status: NEW
Alias: CVE-2026-105841
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2547295
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-06 13:45 UTC by OSIDB Bzimport
Modified: 2026-10-15 09:37 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:83525 0 None None None 2026-10-15 09:37:29 UTC

Description OSIDB Bzimport 2026-10-06 13:45:59 UTC 
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.
Comment 1 Jon Orris 2026-10-15 09:37:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:83525 https://access.redhat.com/errata/RHSA-2026:83525
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