Process crash via unchecked outfile assembly
Published Aug 22, 2026 · Updated Aug 22, 2026
Heap-based buffer overflow in hashcat 7.1.2 and earlier allows local users to crash the process via a crafted hash file. The outfile_write() function in src/outfile.c appends an attacker-sized username, separator, hash, and plaintext into a fixed HCBUFSIZ_LARGE heap buffer with unchecked memcpy calls. Triggering the overwrite requires a local user to run --username --show on the crafted file; the demonstrated consequence is memory corruption and a process crash.
Summary
What happened
Heap-based buffer overflow in hashcat 7.1.2 and earlier allows local users to crash the process via a crafted hash file. The outfile_write() function in src/outfile.c appends an attacker-sized username, separator, hash, and plaintext into a fixed HCBUFSIZ_LARGE heap buffer with unchecked memcpy calls. Triggering the overwrite requires a local user to run --username --show on the crafted file; the demonstrated consequence is memory corruption and a process crash.
The record
- CVE
- CVE-2026-68768
- Published
- Aug 22, 2026
- Updated
- Aug 22, 2026
- Vendor
- hashcat
- Product
- hashcat
- Classifications
- T1204.002
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Aug 22, 2026CVE publishedPublication date reported by the CVE source.
- Aug 22, 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?
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- Affected versionversion=0 <=7.1.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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