CVE catalog
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 sende
- Severity
- Medium · CVSS 6.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.21% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | lrzsz | sid | 0.13.1-1 | fixed |
| Debian | lrzsz | forky | 0.13.1-1 | fixed |
| Debian | lrzsz | trixie | 0.12.21rc-0.2 | vulnerable |
| Debian | lrzsz | bookworm | 0.12.21-10 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | lrzsz | source | sid | 0.12.21rc-5 | not yet assigned | Not reported | [1150240] |
| Debian | lrzsz | source | forky | 0.12.21rc-5 | not yet assigned | Not reported | [1150240] |
| Debian | lrzsz | source | trixie | (unfixed) | not yet assigned | Not reported | [1150240] |
| Debian | lrzsz | source | bookworm | (unfixed) | not yet assigned | Not reported | [1150240] |
Notes
[trixie] lrzsz: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [lrzsz]Affected
Details (2)
0.12.21-10· arm64 · bookwormAffected
nvd · lrzsz · debian · bookworm; nvd · lrzsz · debian · 12
0.12.21-10+b1· amd64 · bookwormAffected
nvd · lrzsz · debian · bookworm; nvd · lrzsz · debian · 12
[Debian 13 (Trixie)]
- [lrzsz]Affected
Details (2)
0.12.21rc-0.2· amd64 · trixieAffected
nvd · lrzsz · debian · 13
0.12.21rc-0.2· arm64 · trixieAffected
nvd · lrzsz · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-105842]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-105842]
- [https://security-tracker.debian.org/tracker/CVE-2026-105842]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-105842.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]