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Fencer Intel
high 7.5

CVE-2026-105840 json

lrzsz before 0.13.0 Path Traversal via lrz Restricted Mode checkpath()

published last mo. modified last mo. also EUVD-2026-93392

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

lrzsz before 0.13.0 contains a path traversal vulnerability in the lrz receive utility's restricted mode that allows malicious ZMODEM senders to write files outside the current directory using absolute pathnames. Because checkpath() in src/lrz.c only rejects '../' sequences unless built with --enable-pubdir, attackers can send files named with absolute paths to overwrite any file writable by the receiving user.

Patch / fix

  • Uwe Ohse lrzsz 0.13.0
  • lrzsz Debian 14 0.12.21rc-5

debian advisories DEBIAN-CVE-2026-105840

  • lrzsz RHEL 8 0.12.20-46.el8_10

red hat advisories RHSA-2026:83525

  • lrzsz AlmaLinux 9 0.12.20-58.el9_8
  • lrzsz AlmaLinux 10 0.12.20-69.el10_2
  • lrzsz AlmaLinux 8 0.12.20-46.el8_10

almalinux advisories ALSA-2026:89755ALSA-2026:86056ALSA-2026:83525

  • lrzsz Rocky Linux 9 0.12.20-58.el9_8
  • lrzsz Rocky Linux 10 0.12.20-69.el10_2
  • lrzsz Rocky Linux 8 0.12.20-46.el8_10

rocky linux advisories RLSA-2026:89755RLSA-2026:86056RLSA-2026:83525

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-105840 updated cvss 7.5

lrzsz: lrzsz: Arbitrary file overwrite via absolute path traversal in restricted mode

  • Red Hat Enterprise Linux 6 lrzsz 0.12.20-27.1.el6
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 lrzsz 0.12.20-27.1.el6
    affected: workaround, no fix available
  • Red Hat Enterprise Linux BaseOS (v. 8) lrzsz 0.12.20-46.el8_10
    fixed: vendor fix RHSA-2026:83525
  • Red Hat Enterprise Linux BaseOS (v. 9) lrzsz 0.12.20-58.el9_8
    fixed: vendor fix RHSA-2026:89755
  • Red Hat Enterprise Linux BaseOS (v. 10) lrzsz 0.12.20-69.el10_2
    fixed: vendor fix RHSA-2026:86056

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last mo.

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 7.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 7.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Uwe Ohse lrzsz

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.