---
title: "CVE-2025-6545\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-2025-6545?format=md
keywords: index, follow
---

# CVE-2025-6545

Publication date 23 June 2025

Last updated 19 June 2026

---

Ubuntu priority

**Medium**

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

Toggle side navigation

## Description

Improper Input Validation vulnerability in pbkdf2 allows Signature Spoofing
by Improper Validation. This vulnerability is associated with program files
lib/to-buffer.Js.
This issue affects pbkdf2: from 3.0.10 through 3.1.2.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| node-pbkdf2 | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Ignored end of life, was needs-triage |
| 24.10 oracular | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Fixed 3.1.2-3ubuntu0.1~esm1  Ubuntu Pro |
| 22.04 LTS jammy | Fixed 3.1.2-2ubuntu0.1~esm1  Ubuntu Pro |
| 20.04 LTS focal | Fixed 3.0.16-1ubuntu0.1~esm1  Ubuntu Pro |
| 18.04 LTS bionic | Fixed 3.0.14-2ubuntu0.1~esm1  Ubuntu Pro |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2025-6545?format=md#patch-details)

### Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

[Get Ubuntu Pro](https://ubuntu.com/pro)
[30-day free trial](https://ubuntu.com/pro/free-trial)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| node-pbkdf2 | * Upstream:   [26d4fd3](https://github.com/browserify/pbkdf2/commit/26d4fd391e00ed806840ea1ef7341937985f4ba8) |

## Severity score breakdown

CVSS version:
CVSS v4.0

**Base score**

9.1 · Critical

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Attack requirements | Present |
  | Privileges required | None |
  | User interaction | None |
  | Vulnerable system - Confidentiality impact | Low |
  | Vulnerable system - Integrity impact | High |
  | Vulnerable system - Availability impact | None |
  | Subsequent system - Confidentiality impact | High |
  | Subsequent system - Integrity impact | High |
  | Subsequent system - Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.1 · Critical |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-6545)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2025-6545)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2025-6545)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2025-6545)

### Related Ubuntu Security Notices (USN)

+ [USN-8452-1](https://usn.ubuntu.com/USN-8452-1)
+ pbkdf2 vulnerability
+ 18 June 2026

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2025-6545>
* <https://github.com/browserify/pbkdf2/security/advisories/GHSA-h7cp-r72f-jxh6>
* <https://github.com/browserify/pbkdf2/commit/9699045c37a07f8319cfb8d44e2ff4252d7a7078>
* <https://github.com/browserify/pbkdf2/commit/e3102a8cd4830a3ac85cd0dd011cc002fdde33bb>