CVE-2026-107167 M17n-lib: heap use-after-free write in re_init_ic()
A heap use-after-free in M17n-lib allows attackers to cause denial of service or potentially execute arbitrary code via crafted text input.
- 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-2026-107167?
CVE-2026-107167 is a medium-severity use after free 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. A user providing specially crafted text input can trigger a heap use-after-free condition during input-method state transitions. Under specific conditions, the library frees an internal input context object but subsequently attempts to write to that freed memory. This issue can cause applications relying on the library to crash, leading to a Denial of Service (DoS), or potentially allow arbitrary code execution.
Weakness: CWE-416
Which versions are affected by CVE-2026-107167?
How do I fix CVE-2026-107167?
No fix has been published for CVE-2026-107167 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-107167 being exploited?
There is no known exploitation of CVE-2026-107167 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-107167, GHSA-3wc7-m5vh-qr2g, UBUNTU-CVE-2026-107167.