# CVE-2025-7700: Ffmpeg: null pointer dereference in ffmpeg als decoder (libavcodec/alsdec.c) > Attackers can cause a denial of service by processing malformed audio files, crashing applications using the FFmpeg ALS decoder. - **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/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:** 7 Nov 2025 - **Updated:** 6 May 2026 - **Also known as:** DEBIAN-CVE-2025-7700, GHSA-p7g8-g57p-r8qx, OESA-2025-2905, OESA-2025-2906, OESA-2025-2907, SUSE-SU-2025:02990-1, SUSE-SU-2025:03162-1, SUSE-SU-2025:2990-1, SUSE-SU-2026:20932-1, UBUNTU-CVE-2025-7700, USN-7871-1, openSUSE-SU-2025:15396-1, openSUSE-SU-2025:15427-1, openSUSE-SU-2026:20420-1 ## What is CVE-2025-7700? CVE-2025-7700 is a medium-severity vulnerability in ffmpeg, published on 7 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description A flaw was found in FFmpeg’s ALS audio decoder, where it does not properly check for memory allocation failures. This can cause the application to crash when processing certain malformed audio files. While it does not lead to data theft or system control, it can be used to disrupt services and cause a denial of service. Weakness: CWE-476 (NULL Pointer Dereference) ## Which versions are affected by CVE-2025-7700? | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `ffmpeg` | SUSE:Enterprise Storage 7.1 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP6 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP7 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg-4` | SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 4.4.6-150600.13.30.1 | | `ffmpeg` | SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg-4` | SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 4.4.6-150600.13.30.1 | | `ffmpeg` | SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise Server 15 SP5-LTSS | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg-7` | SUSE:Linux Enterprise Server 16.0 | All versions | 7.1.2-160000.1.1 | | `ffmpeg` | SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg` | SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg-7` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 7.1.2-160000.1.1 | | `ffmpeg` | SUSE:Linux Enterprise Workstation Extension 15 SP6 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg-4` | SUSE:Linux Enterprise Workstation Extension 15 SP6 | All versions | 4.4.6-150600.13.30.1 | | `ffmpeg` | SUSE:Linux Enterprise Workstation Extension 15 SP7 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg-4` | SUSE:Linux Enterprise Workstation Extension 15 SP7 | All versions | 4.4.6-150600.13.30.1 | | `ffmpeg` | openSUSE:Leap 15.6 | All versions | 3.4.2-150200.11.67.1 | | `ffmpeg-4` | openSUSE:Leap 15.6 | All versions | 4.4.6-150600.13.30.1 | | `ffmpeg-7` | openSUSE:Leap 16.0 | All versions | 7.1.2-160000.1.1 | | `ffmpeg-4` | openSUSE:Tumbleweed | All versions | 4.4.6-5.1 | | `ffmpeg-7` | openSUSE:Tumbleweed | All versions | 7.1.1-8.1 | ## How do I fix CVE-2025-7700? Apply the vendor's patch. ## Is CVE-2025-7700 being exploited? There is no known exploitation of CVE-2025-7700 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2025-7700 and fix it if it is affected. What it is: CVE-2025-7700 is a medium-severity vulnerability in ffmpeg, published on 7 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2025-7700 in the wild and no public exploit code. Affected product: ffmpeg. 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-2025-7700/ (Markdown: https://insights.sbomify.com/CVE-2025-7700/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7700 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7700 - OSV: https://osv.dev/vulnerability/CVE-2025-7700 --- From sbomify Insights: https://insights.sbomify.com/CVE-2025-7700/ Summaries are generated and may contain mistakes; the official description above is the record.