CVE-2026-75818: Heap Buffer Overflow in GNU Aspell's prezip utility

Severity: low (CVSS 1.8 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-06 · updated 2026-10-06
Weakness: CWE-122

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.

Affected products

GNU Aspell: before 0.60.8.3 — fixed in 0.60.8.3

How to fix

Upgrade to a fixed version: GNU Aspell 0.60.8.3. Check the vendor advisory for mitigations.

References

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