---
title: "CVE-2025-9809\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-2025-9809?format=md
keywords: index, follow
---

# CVE-2025-9809

Publication date 1 September 2025

Last updated 7 August 2026

---

Ubuntu priority

**High**

[Why this priority?](https://ubuntu.com/security/CVE-2025-9809?format=md#priority-reason )

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2025-9809?format=md#impact-score)

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## Description

Out-of-bounds write in cdfs\_open\_cue\_track in libretro libretro-common
latest on all platforms allows remote attackers to execute arbitrary code
via a crafted .cue file with a file path exceeding PATH\_MAX\_LENGTH that is
copied using memcpy into a fixed-size buffer.

### Why is this CVE high priority?

remote arbitrary code execution

[Learn more about Ubuntu priority](https://ubuntu.com/security/cves/about#priority)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| retroarch | 26.04 LTS resolute | Not affected |
| 25.10 questing | Fixed 1.20.0+dfsg-3ubuntu0.1 |
| 25.04 plucky | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Fixed 1.18.0+dfsg-1ubuntu0.1~esm1  Ubuntu Pro |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |

---

* [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-2025-9809?format=md#patch-details)

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### 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 |
| --- | --- |
| retroarch | * Upstream:   [a08b2b5](https://github.com/libretro/libretro-common/commit/a08b2b574787408abbb4ba34faf673117f9a0eae) |

## Severity score breakdown

CVSS version:

CVSS v4.0

[CVSS v4.0](https://ubuntu.com/security/CVE-2025-9809?format=md)
[CVSS v3.0](https://ubuntu.com/security/CVE-2025-9809?format=md)

**Base score**

8.4 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Attack requirements | None |
  | Privileges required | None |
  | User interaction | Active |
  | Vulnerable system - Confidentiality impact | High |
  | Vulnerable system - Integrity impact | High |
  | 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 | 8.4 · High |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-9809)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2025-9809)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2025-9809)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2025-9809)

### Related Ubuntu Security Notices (USN)

+ [USN-8166-1](https://usn.ubuntu.com/USN-8166-1)
+ RetroArch vulnerability
+ 12 April 2026

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2025-9809>
* <https://github.com/libretro/libretro-common/issues/222>
* <https://github.com/libretro/libretro-common/blob/master/formats/cdfs/cdfs.c#L471>