CVE-2023-53626 ext4: fix possible double unlock when moving a directory
High 7.8
Published
Updated
Check this codebase for CVE-2023-53626 and fix it if it is affected.
What it is: CVE-2023-53626 is a high-severity vulnerability in Linux kernel, published on 7 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-53626 in the wild and no public exploit code.
Affected product: Linux kernel. 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-2023-53626/ (Markdown: https://insights.sbomify.com/CVE-2023-53626/index.md)
A double unlock bug in the ext4 filesystem during directory moves can cause a kernel panic, leading to denial of service.
- 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
What is CVE-2023-53626?
CVE-2023-53626 is a high-severity vulnerability in Linux kernel, published on 7 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix possible double unlock when moving a directory
Weakness: CWE-415
Which versions are affected by CVE-2023-53626?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53626?
Apply the vendor's patch.
Is CVE-2023-53626 being exploited?
There is no known exploitation of CVE-2023-53626 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2023-53626, GHSA-g934-mv7g-597h, UBUNTU-CVE-2023-53626.