Skip to content
Fencer Vulns
medium 6.2

CVE-2026-107168 json

M17n-lib: parser infinite loop on malformed utf-8 in count_utf_8_chars()

published 2026-10-07 32 d ago modified 2026-11-05 3 d ago also EUVD-2026-94313

cvss
6.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

A flaw was found in m17n-lib. By providing crafted input containing an invalid UTF-8 character sequence, an attacker can cause the text parsing function to enter an infinite loop. This issue leads to sustained high CPU utilization, resulting in a Denial of Service (DoS) for the affected application.

Patch / fix

  • m17n-lib Debian 14 1.8.7-1

debian advisories DEBIAN-CVE-2026-107168

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-2026-107168 updated cvss 6.2

m17n-lib: Parser infinite loop on malformed UTF-8 in count_utf_8_chars()

  • Red Hat Enterprise Linux 6 m17n-lib 1.8.4-7.el10
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 m17n-lib-tools, m17n-lib 1.8.4-7.el10 Red Hat Enterprise Linux 8 m17n-lib 1.8.4-7.el10 Red Hat Enterprise Linux 9 m17n-lib 1.8.4-7.el10 Red Hat Enterprise Linux 10 m17n-lib 1.8.4-7.el10
    affected: workaround, no fix available “Fix deferred”

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
partial
Assessed
32 d ago

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns 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.