CVE-2026-75818 Heap Buffer Overflow in GNU Aspell's prezip utility
A heap buffer overflow in GNU Aspell's prezip utility allows attackers to crash the application by tricking users into processing malicious compressed files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-75818?
CVE-2026-75818 is a low-severity memory corruption vulnerability in GNU Aspell, published on 6 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
GNU Aspell prezip-bin contains a heap-based buffer overflow vulnerability in the decompressor in prog/prezip.c. The decompressor does not properly check buffer space, so a crafted compressed file can cause out-of-bounds read and write operations on the heap. An attacker who convinces a user to process a malicious compressed file with prezip-bin can trigger memory corruption, leading to a processs crash.
This issue was fixed in commit 15b188437f9e0192d4ac4472ad66a4e2f62a782f which will be released in version 0.60.8.3.
Weakness: CWE-122
Which versions are affected by CVE-2026-75818?
How do I fix CVE-2026-75818?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-75818 being exploited?
There is no known exploitation of CVE-2026-75818 in the wild and no public exploit code.
Sources
Also known as AZL-105969, BELL-CVE-2026-75818, DEBIAN-CVE-2026-75818, ECHO-704a-feda-9882, GHSA-93mw-x5wh-jf8f, UBUNTU-CVE-2026-75818.