CVE-2026-105842
lrzsz before 0.13.0 Heap Buffer Overflow via lrz procheader() Pathname
- State
- Published
- Severity
- 6.1 Medium
- Published
- Oct 6, 2026
- Updated
- Oct 6, 2026
- Reserved
- Oct 5, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.1 Medium | 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 | VulnCheck |
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H | VulnCheck |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
lrzszUwe Ohse |
|
References
- lrzsz 0.13.0 security changesvendor-advisory
- https://ohse.de/uwe/software/lrzsz.htmlproduct
- VulnCheck Advisory: lrzsz before 0.13.0 Heap Buffer Overflow via lrz procheader() Pathnamethird-party-advisory
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