hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that… (CVE-2026-68765)
Hashcat master branch builds after version 7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301). This vulnerability arises from improper handling of the ninth hash field token, which can overflow a fixed 256-byte buffer by up to 44 bytes. The overflow can corrupt adjacent heap memory, potentially causing heap corruption or memory access violations. The vulnerability has a CVSS score of 6.1, indicating medium severity.
AI Analysis
Technical Summary
The vulnerability exists in hashcat's KeePass AESKDF/KDBX v4 module (module 34301) in master branch builds after v7.1.2. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer without length checks. This allows an attacker supplying an oversized ninth hash field token to write up to 44 bytes beyond the buffer boundary into adjacent esalt fields and heap chunk metadata, causing heap buffer overflow (CWE-122). This can lead to heap corruption or memory access violations. The CVSS 3.1 vector is AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H, indicating local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, low integrity impact, and high availability impact.
Potential Impact
The heap buffer overflow can corrupt adjacent heap memory, potentially leading to heap corruption or memory access violations. The impact includes a high availability impact (denial of service or crash) and a low integrity impact. There is no confidentiality impact. Exploitation requires local access and user interaction, with no privileges required. No known exploits are reported in the wild.
Mitigation Recommendations
No official patch or fix is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, avoid processing untrusted or malformed KeePass AESKDF/KDBX v4 hashes with hashcat builds after v7.1.2. Monitor vendor channels for updates and apply patches once available.
hashcat master branch builds after v7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that… (CVE-2026-68765)
Description
Hashcat master branch builds after version 7.1.2 contain a heap buffer overflow vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301). This vulnerability arises from improper handling of the ninth hash field token, which can overflow a fixed 256-byte buffer by up to 44 bytes. The overflow can corrupt adjacent heap memory, potentially causing heap corruption or memory access violations. The vulnerability has a CVSS score of 6.1, indicating medium severity.
CVSS v3.1
Score 6.1medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in hashcat's KeePass AESKDF/KDBX v4 module (module 34301) in master branch builds after v7.1.2. The module accepts up to 600 hex characters for the ninth token field but decodes it into a fixed 256-byte buffer without length checks. This allows an attacker supplying an oversized ninth hash field token to write up to 44 bytes beyond the buffer boundary into adjacent esalt fields and heap chunk metadata, causing heap buffer overflow (CWE-122). This can lead to heap corruption or memory access violations. The CVSS 3.1 vector is AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H, indicating local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, low integrity impact, and high availability impact.
Potential Impact
The heap buffer overflow can corrupt adjacent heap memory, potentially leading to heap corruption or memory access violations. The impact includes a high availability impact (denial of service or crash) and a low integrity impact. There is no confidentiality impact. Exploitation requires local access and user interaction, with no privileges required. No known exploits are reported in the wild.
Mitigation Recommendations
No official patch or fix is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, avoid processing untrusted or malformed KeePass AESKDF/KDBX v4 hashes with hashcat builds after v7.1.2. Monitor vendor channels for updates and apply patches once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jfqq-rfm8-8frm
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-68765"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a838c34bf8831d539b4b05d
Added to database: 08/17/2026, 22:33:24 UTC
Last enriched: 08/20/2026, 03:28:41 UTC
Last updated: 10/02/2026, 02:46:06 UTC
Views: 38
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