CVE-2026-68767

Summary

hashcat's fgetl() function in src/filehandling.c writes a null terminator one byte past the caller's buffer when an input line is exactly the buffer length. Attackers can trigger this out-of-bounds heap write by providing a hash file, potfile, or wordlist containing a line of exactly HCBUFSIZ_LARGE bytes.

Affected Software

Weaknesses

• CWE-193: Off-by-one Error

References

• https://github.com/hashcat/hashcat/issues/4739
• https://github.com/hashcat/hashcat
• https://github.com/hashcat/hashcat/commit/93b55d37d3b2340013d4036f10181ddc67d44249
• https://github.com/hashcat/hashcat/blob/v7.1.2/src/filehandling.c#L1032-L1060
• https://www.vulncheck.com/advisories/hashcat-through-off-by-one-out-of-bounds-heap-write-in-fgetl

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