# CVE-2026-72305: VDUSE: avoid leaking information to userspace

> A local attacker can exploit unaligned bounce pages in the Linux kernel VDUSE driver to leak sensitive kernel memory information to userspace.

- **Severity:** Not scored
- **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:** Yes
- **Published:** 15 Aug 2026
- **Updated:** 23 Aug 2026
- **Also known as:** BELL-CVE-2026-72305, DEBIAN-CVE-2026-72305, GHSA-j4px-38fv-h9g9, UBUNTU-CVE-2026-72305

## What is CVE-2026-72305?

CVE-2026-72305 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:

VDUSE: avoid leaking information to userspace

The bounceing is not necessarily page aligned, so current VDUSE can
leak kernel information through mapping bounce pages to
userspace. Allocate bounce pages with __GFP_ZERO to avoid leaking
information to userspace.

## Which versions are affected by CVE-2026-72305?


## How do I fix CVE-2026-72305?

Apply the vendor's patch.

## Is CVE-2026-72305 being exploited?

There is no known exploitation of CVE-2026-72305 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-72305 and fix it if it is affected.

What it is: CVE-2026-72305 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-2026-72305 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-2026-72305/ (Markdown: https://insights.sbomify.com/CVE-2026-72305/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-72305
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72305
- OSV: https://osv.dev/vulnerability/CVE-2026-72305

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-72305/
Summaries are generated and may contain mistakes; the official description above is the record.