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  4. CVE 2026 105842 lrzsz before 0130 heap buffer overflow via lrz
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Back to active CVEs
Medium · CVSS 6.1CVE-2026-105842

lrzsz before 0.13.0 Heap Buffer Overflow via lrz procheader() PathnameCVE-2026-105842

Answer in brief

CVE-2026-105842 records a Medium severity (CVSS 6.1) vulnerability in lrzsz before 0.13.0 Heap Buffer Overflow via lrz procheader() Pathname. The current sources do not mark it as known exploited. The current feed maps Uwe Ohse/lrzsz (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 6, 2026Updated Oct 6, 2026Source checked Oct 6, 2026First seen by HOL Oct 6, 2026Material review Oct 6, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Uwe Ohse/lrzsz (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Uwe Ohse/lrzszgeneric>=0 <0.13.00.13.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Uwe Ohse/lrzsz.
  2. 2Review the reported fix. Update Uwe Ohse/lrzsz to 0.13.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 6, 2026

Sources and claim methodology

  • Source referenceohse.de
  • Source referenceohse.de
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • lrzsz before 0.13.0 Path Traversal via lrz Restricted Mode checkpath()Same uwe ohse/lrzsz package
  • lrzsz before 0.13.0 OS Command Injection via lrz Pipe ModeSame uwe ohse/lrzsz package
  • Cross-Site Scripting (XSS) vulnerability identified in OpenText™ Content ManagementSame generic ecosystem
  • Denial-of-service vulnerability in ESET PROTECT On-PremSame generic ecosystem
  • HortusFox < 6.2 Remote Code Execution via Theme ImportSame generic ecosystem
  • Microsoft UFO: Authenticated Android shell command injection in Mobile MCP type_text and launch_appSame generic ecosystem

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-122
Source
CVE List V5
Source checked
Oct 6, 2026
References
3 linked sources
Open source record