CVE-2026-107169 M17n-lib: null-pointer write in read_mtext_element() on malformed utf-8
An attacker can cause a denial of service by providing malformed UTF-8 input to the M17n-lib library, triggering a null pointer dereference crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-107169?
CVE-2026-107169 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 7 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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).
Weakness: CWE-476
Which versions are affected by CVE-2026-107169?
How do I fix CVE-2026-107169?
No fix has been published for CVE-2026-107169 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-107169 being exploited?
There is no known exploitation of CVE-2026-107169 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-107169, GHSA-pjw2-cc43-prpf, UBUNTU-CVE-2026-107169.