Process crash via unchecked prefix advancement
Published Oct 6, 2026 · Updated Oct 6, 2026
A heap buffer overflow in GNU Aspell prezip-bin before 0.60.8.3 allows context-dependent attackers to crash it via a crafted compressed word list. In prog/prezip.c, the ADV macro marks an embedded NUL as invalid but continues advancing the word pointer instead of taking the error path, permitting out-of-bounds heap access. Exploitation requires a user or application to decompress the attacker-supplied list; the reported consequence is a process crash.
Summary
What happened
A heap buffer overflow in GNU Aspell prezip-bin before 0.60.8.3 allows context-dependent attackers to crash it via a crafted compressed word list. In prog/prezip.c, the ADV macro marks an embedded NUL as invalid but continues advancing the word pointer instead of taking the error path, permitting out-of-bounds heap access. Exploitation requires a user or application to decompress the attacker-supplied list; the reported consequence is a process crash.
The record
- CVE
- CVE-2026-75818
- Published
- Oct 6, 2026
- Updated
- Oct 6, 2026
- Vendor
- CVS Home
- Product
- Aspell
- Classifications
- T1204.002
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Oct 6, 2026CVE publishedPublication date reported by the CVE source.
- Oct 6, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <0.60.8.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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