CVE-2026-105842
lrzsz before 0.13.0 Heap Buffer Overflow via lrz procheader() Pathname
Uwe Ohse lrzsz
CVSS
6.1MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 10% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 0.13.0lrzszCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
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.
Text from CVE List
Affected versions 1
- lrzszaffected: all versions before 0.13.0CVE List