CVE-2026-105842

Medium

Description

lrzsz before 0.13.0 contains a heap-based buffer overflow vulnerability in procheader() of the lrz receive utility when copying overlong sender-supplied filenames into Pathname. Malicious ZMODEM senders can supply filenames up to 8192 bytes, overflowing the buffer via sprintf() in pipe mode or strcpy() to corrupt heap memory and crash lrz.

SeverityMedium

CVSS6.4

Exploit probability—

ProductUwe Ohse Lrzsz

PublishedOct 6, 2026

First seenOct 6, 2026

Weakness typeCWE-122CWE-122

How to fix

Update

Uwe Ohse lrzsz0.13.0 or later

Vendor advisories

ohse.de/uwe/software/lrzsz/NEWS-0.13.0.html

Affected products

Product	Affected versions	Fixed in
Uwe Ohse lrzsz	v < 0.13.0	0.13.0

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