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CVE-2026-107169

m17n-lib: NULL-pointer write in read_mtext_element() on malformed UTF-8

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Severity

Moderate

Red Hat Product Security

6.2

CVSS 3.1

Review impact separately from score.

Published · October 7, 2026

Updated · October 8, 2026

Description

A flaw was found in m17n-lib. An attacker could provide specially crafted or truncated UTF-8 input to trigger an unhandled null pointer dereference during text processing. This issue causes the application to crash unexpectedly, resulting in a Denial of Service (DoS).

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 6.2
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference