# CVE-2025-10921: GIMP HDR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

> Remote attackers can execute arbitrary code by tricking users into opening malicious HDR files in GIMP due to a heap-based buffer overflow.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 29 Oct 2025
- **Updated:** 26 Feb 2026
- **Also known as:** CLSA-2025-1765988423, CLSA-2025-1765989021, CLSA-2025-1767025227, CLSA-2025-1767025812, DEBIAN-CVE-2025-10921, DSA-6018-1, GHSA-6pqm-mccv-6977, SUSE-SU-2025:4333-1, SUSE-SU-2025:4335-1, SUSE-SU-2025:4382-1, UBUNTU-CVE-2025-10921, openSUSE-SU-2025:15793-1

## What is CVE-2025-10921?

CVE-2025-10921 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 29 Oct 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

GIMP HDR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of HDR files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-27803.

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

## Which versions are affected by CVE-2025-10921?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `gegl` | SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 0.4.46-150600.4.3.1 |
| `gegl` | SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 0.4.46-150600.4.3.1 |
| `gegl` | SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 0.2.0-15.9.1 |
| `gegl` | SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 0.2.0-15.9.1 |
| `gegl` | SUSE:Linux Enterprise Workstation Extension 15 SP6 | All versions | 0.3.34-150000.3.6.1 |
| `gegl` | SUSE:Linux Enterprise Workstation Extension 15 SP6 | All versions | 0.4.46-150600.4.3.1 |
| `gegl` | SUSE:Linux Enterprise Workstation Extension 15 SP7 | All versions | 0.3.34-150000.3.6.1 |
| `gegl` | SUSE:Linux Enterprise Workstation Extension 15 SP7 | All versions | 0.4.46-150600.4.3.1 |
| `gegl` | openSUSE:Leap 15.6 | All versions | 0.4.46-150600.4.3.1 |
| `gegl` | openSUSE:Tumbleweed | All versions | 0.4.64-3.1 |

Products: Debian Debian Linux, Gimp Gimp.

## How do I fix CVE-2025-10921?

Apply the vendor's patch.

## Is CVE-2025-10921 being exploited?

There is no known exploitation of CVE-2025-10921 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-10921 and fix it if it is affected.

What it is: CVE-2025-10921 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 29 Oct 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-10921 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2025-10921/ (Markdown: https://insights.sbomify.com/CVE-2025-10921/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-10921
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-10921
- OSV: https://osv.dev/vulnerability/CVE-2025-10921

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-10921/
Summaries are generated and may contain mistakes; the official description above is the record.