Vulnerability Intelligence Report
lrzsz before 0.13.0 Heap Buffer Overflow via lrz procheader() Pathname
CVE-2026-105842
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.
No Active Exploit Signals
CVSS Base Score
6.1
MEDIUM
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
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Weaknesses (CWE)
CWE-122 ↗Heap-based Buffer Overflow
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Uwe Ohse | lrzsz | 0 < 0.13.0 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VulnCheck · Bug Bounty Provider · USA |
| Reserved | 2026-10-05T22:00:10 |
| Published | 2026-10-06T13:35:47 |
| Patch Date | 2026-09-30 |
| Last Updated | 2026-10-06T19:30:50 |
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