CVE-2026-74428 rxrpc: Fix double unlock in rxrpc_recvmsg()
Critical 9.8
Published
Updated
Check this codebase for CVE-2026-74428 and fix it if it is affected.
What it is: CVE-2026-74428 is a critical vulnerability in Linux, published on 15 Aug 2026. 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-2026-74428 in the wild and no public exploit code.
Affected product: 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-2026-74428/ (Markdown: https://insights.sbomify.com/CVE-2026-74428/index.md)
A double unlock bug in the Linux kernel's rxrpc module can cause a system crash, requiring a kernel patch to resolve.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74428?
CVE-2026-74428 is a critical vulnerability in Linux, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Fix double unlock in rxrpc_recvmsg()
Fix a double unlock in rxrpc_recvmsg() when dealing with OOB messages.
Which versions are affected by CVE-2026-74428?
How do I fix CVE-2026-74428?
Apply the vendor's patch.
Is CVE-2026-74428 being exploited?
There is no known exploitation of CVE-2026-74428 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74428, DEBIAN-CVE-2026-74428, GHSA-jr6m-prj2-3cff, UBUNTU-CVE-2026-74428.