CVE-2026-75818: Heap Buffer Overflow in GNU Aspell prezip-bin (before 0.60.8.3)
CVE-2026-75818 Published on October 6, 2026
Heap Buffer Overflow in GNU Aspell's prezip utility
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.
Vulnerability Analysis
CVE-2026-75818 is exploitable with local system access. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Products Associated with CVE-2026-75818
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Affected Versions
GNU Aspell:- Before 0.60.8.3 is affected.