CVE-2026-105842

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

Published Oct 6, 2026 CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Uwe Ohse
Uwe Ohse lrzsz
Vendors & Products Uwe Ohse
Uwe Ohse lrzsz
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title lrzsz before 0.13.0 Heap Buffer Overflow via lrz procheader() Pathname
First Time appeared Lrzsz Project
Lrzsz Project lrzsz
Weaknesses CWE-122
CPEs cpe:2.3:a:lrzsz_project:lrzsz:*:*:*:*:*:*:*:*
Vendors & Products Lrzsz Project
Lrzsz Project lrzsz
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H'}

cvssV4_0

{'score': 6.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 6, 2026, 7:30 PM
Reserved
Oct 5, 2026, 10:00 PM
Status
Deferred
Published
Oct 6, 2026, 2:17 PM
Modified
Oct 6, 2026, 8:17 PM
Severity
Moderate
Public date
Oct 6, 2026, 1:35 PM