# CVE-2025-64524: CUPS rastertopclx Filter Vulnerable to Heap Buffer Overflow Leading to Potential Arbitrary Code Execution

> A heap buffer overflow in the CUPS rastertopclx filter allows attackers to execute arbitrary code or cause a denial of service via malicious input.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 20 Nov 2025
- **Updated:** 21 Nov 2025
- **Also known as:** CLSA-2026-1768210495, CLSA-2026-1768556132, DEBIAN-CVE-2025-64524, GHSA-rq44-2q5p-x3hv, MGASA-2025-0312, OESA-2025-2751, OESA-2026-1119, OESA-2026-1120, OESA-2026-1121, OESA-2026-1122, OESA-2026-1123, UBUNTU-CVE-2025-64524, USN-7878-2

## What is CVE-2025-64524?

CVE-2025-64524 is a low-severity memory corruption vulnerability in OpenPrinting cups-filters, published on 20 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

cups-filters contains backends, filters, and other software required to get the cups printing service working on operating systems other than macos. In versions 2.0.1 and prior, a heap-buffer-overflow vulnerability in the rastertopclx filter causes the program to crash with a segmentation fault when processing maliciously crafted input data. This issue can be exploited to trigger memory corruption, potentially leading to arbitrary code execution. This issue has been patched via commit 956283c.

Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2025-64524?

It affects 1 product.


Products: Openprinting Cups-Filters.

## How do I fix CVE-2025-64524?

Apply the vendor's patch.

## Is CVE-2025-64524 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-64524 exists.

## Other vulnerabilities in OpenPrinting cups-filters

- [CVE-2025-64503](https://insights.sbomify.com/CVE-2025-64503/): [BIGSLEEP-434615384] cups-filters 1.x: out of bounds write in pdftoraster (medium 4.0)
- [CVE-2025-57812](https://insights.sbomify.com/CVE-2025-57812/): [BIGSLEEP-434612419] CUPS-Filters has heap-buffer-overflow write in `cfImageLut()` (low 3.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-64524 and fix it if it is affected.

What it is: CVE-2025-64524 is a low-severity memory corruption vulnerability in OpenPrinting cups-filters, published on 20 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-64524 exists.

Affected product: OpenPrinting cups-filters. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-64524/ (Markdown: https://insights.sbomify.com/CVE-2025-64524/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-64524
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-64524
- OSV: https://osv.dev/vulnerability/CVE-2025-64524

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-64524/
Summaries are generated and may contain mistakes; the official description above is the record.