---
title: "CVE-2026-68765\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-68765?format=md
keywords: index, follow
---

# CVE-2026-68765

Publication date 17 August 2026

Last updated 19 August 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.1 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2026-68765?format=md#impact-score)

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## Description

hashcat master branch builds after v7.1.2 contain a heap buffer overflow
vulnerability in the KeePass AESKDF/KDBX v4 module (module 34301) that
allows attackers to corrupt adjacent heap memory by supplying an oversized
ninth hash field token. The module accepts up to 600 hex characters for the
ninth token field but decodes it into a fixed 256-byte buffer with no
length check, allowing a maximal input to write up to 44 bytes past the
buffer boundary into adjacent esalt fields and heap chunk metadata,
potentially enabling heap corruption or memory access violations.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| hashcat | 26.04 LTS resolute | Needs evaluation |
| 24.04 LTS noble | Needs evaluation |
| 22.04 LTS jammy | Needs evaluation |
| 20.04 LTS focal | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:

CVSS v4.0

[CVSS v4.0](https://ubuntu.com/security/CVE-2026-68765?format=md)
[CVSS v3.0](https://ubuntu.com/security/CVE-2026-68765?format=md)

**Base score**

5.2 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Attack requirements | None |
  | Privileges required | High |
  | User interaction | Active |
  | 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 |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.2 · Medium |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

**Vector:** CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-68765)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-68765)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-68765)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-68765)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-68765>
* <https://github.com/hashcat/hashcat>
* <https://github.com/hashcat/hashcat/commit/6f374c4ff7d5dc951530fbbbcf6b45e3c169b100>
* <https://github.com/hashcat/hashcat/pull/4755>
* <https://www.vulncheck.com/advisories/hashcat-keepass-kdbx-v4-module-heap-buffer-overflow-via-token-field>