CVE-2026-72433 netfilter: nft_meta_bridge: fix NFT_META_BRI_IIFPVID stack leak
Not scored
Published
Updated
Check this codebase for CVE-2026-72433 and fix it if it is affected.
What it is: CVE-2026-72433 is a vulnerability in Linux, published on 15 Aug 2026. 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-2026-72433 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-2026-72433/ (Markdown: https://insights.sbomify.com/CVE-2026-72433/index.md)
A stack leak in the Linux kernel netfilter bridge module allows attackers to read sensitive kernel memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72433?
CVE-2026-72433 is a vulnerability in Linux, published on 15 Aug 2026. 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:
netfilter: nft_meta_bridge: fix NFT_META_BRI_IIFPVID stack leak
This needs to test for nonzero retval.
Which versions are affected by CVE-2026-72433?
How do I fix CVE-2026-72433?
Apply the vendor's patch.
Is CVE-2026-72433 being exploited?
There is no known exploitation of CVE-2026-72433 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72433, DEBIAN-CVE-2026-72433, GHSA-c523-5r9j-wqh7, UBUNTU-CVE-2026-72433.