# CVE-2025-55212: ImageMagick affected by divide-by-zero in ThumbnailImage via montage -geometry ":" leads to crash > Attackers can cause a denial of service in ImageMagick by providing a specific geometry string to the montage command, triggering a divide-by-zero crash. - **Severity:** Low 3.7 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 26 Aug 2025 - **Updated:** 3 Nov 2025 - **Also known as:** CLSA-2025-1759420123, CLSA-2025-1759420505, CLSA-2025-1760019285, DEBIAN-CVE-2025-55212, GHSA-fh55-q5pj-pxgw, JLSEC-2026-923, MINI-xcc2-cq95-237f, UBUNTU-CVE-2025-55212 ## What is CVE-2025-55212? CVE-2025-55212 is a low-severity denial of service vulnerability in Imagemagick Imagemagick, published on 26 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-28 and 7.1.2-2, passing a geometry string containing only a colon (":") to montage -geometry leads GetGeometry() to set width/height to 0. Later, ThumbnailImage() divides by these zero dimensions, triggering a crash (SIGFPE/abort), resulting in a denial of service. This issue has been patched in versions 6.9.13-28 and 7.1.2-2. Weakness: CWE-369 (Divide By Zero) ## Which versions are affected by CVE-2025-55212? 36 open source packages ship an affected version, including Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU and Magick.NET-Q16-HDRI-OpenMP-arm64. It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `Magick.NET-Q16-AnyCPU` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-AnyCPU` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-AnyCPU` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-AnyCPU` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-OpenMP-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-OpenMP-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-OpenMP-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-OpenMP-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-x86` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-HDRI-x86` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-OpenMP-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-OpenMP-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-OpenMP-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-OpenMP-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-x86` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q16-x86` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-AnyCPU` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-AnyCPU` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-OpenMP-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-OpenMP-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-OpenMP-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-OpenMP-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-arm64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-x64` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-x86` | NuGet | All versions | 14.8.1 | | `Magick.NET-Q8-x86` | NuGet | All versions | 14.8.1 | Products: Imagemagick Imagemagick. ## How do I fix CVE-2025-55212? Upgrade Magick.NET-Q16-AnyCPU to 14.8.1 or later. ## Is CVE-2025-55212 being exploited? It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-55212 exists. ## Other vulnerabilities in Imagemagick Imagemagick - [CVE-2019-19952](https://insights.sbomify.com/CVE-2019-19952/): Use after free in n/a (critical 9.8) - [CVE-2018-16328](https://insights.sbomify.com/CVE-2018-16328/): Null dereference in n/a (critical 9.8) - [CVE-2018-16329](https://insights.sbomify.com/CVE-2018-16329/): Null dereference in n/a (critical 9.8) - [CVE-2017-18210](https://insights.sbomify.com/CVE-2017-18210/): Null dereference in n/a (critical 9.8) - [CVE-2017-14138](https://insights.sbomify.com/CVE-2017-14138/): Denial of service in n/a (critical 9.8) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2025-55212 and fix it if it is affected. What it is: CVE-2025-55212 is a low-severity denial of service vulnerability in Imagemagick Imagemagick, published on 26 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-55212 exists. Affected packages and fixed versions: - Magick.NET-Q16-AnyCPU (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-AnyCPU (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-AnyCPU (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-AnyCPU (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-arm64 (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-arm64 (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-x64 (NuGet): affected all versions; fixed in 14.8.1 - Magick.NET-Q16-HDRI-x64 (NuGet): affected all versions; fixed in 14.8.1 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-2025-55212/ (Markdown: https://insights.sbomify.com/CVE-2025-55212/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2025-55212 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-55212 - OSV: https://osv.dev/vulnerability/CVE-2025-55212 --- From sbomify Insights: https://insights.sbomify.com/CVE-2025-55212/ Summaries are generated and may contain mistakes; the official description above is the record.