CVE-2026-105842

MEDIUM 6.4

lrzsz before 0.13.0 Heap Buffer Overflow via lrz procheader() Pathname

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-122
Vendor	uwe ohse
Product	lrzsz
Published	Oct 6, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

Affected Versions

Uwe Ohse / lrzsz

0 < 0.13.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

ohse.de: https://ohse.de/uwe/software/lrzsz/NEWS-0.13.0.html ohse.de: https://ohse.de/uwe/software/lrzsz.html vulncheck.com: https://www.vulncheck.com/advisories/lrzsz-before-0.13.0-heap-buffer-overflow-via-lrz-procheader-pathname

Credits

Tristan Madani