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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
hashcat hashcat unaffected
Version Status Constraints
0 affected ≤ 7.1.2

No data.

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Project Subscriptions

Vendors Products
Hashcat Subscribe
Hashcat Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Sat, 22 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Description 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.
Title hashcat through 7.1.2 Off-by-One Out-of-Bounds Heap Write in fgetl()
First Time appeared Hashcat
Hashcat hashcat
Weaknesses CWE-193
CPEs cpe:2.3:a:hashcat:hashcat:*:*:*:*:*:*:*:*
Vendors & Products Hashcat
Hashcat hashcat
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-22T14:12:43.477Z

Reserved: 2026-07-31T16:10:55.447Z

Link: CVE-2026-68767

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses