# CVE-2026-53159: misc: fastrpc: fix DMA address corruption due to find_vma misuse

> An integer underflow in the Linux kernel's fastrpc driver corrupts DMA addresses, potentially allowing data modification or denial of service.

- **Severity:** High 8.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **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:** 25 Jun 2026
- **Updated:** 5 Aug 2026
- **Also known as:** BELL-CVE-2026-53159, DEBIAN-CVE-2026-53159, GHSA-3439-cqxh-wp94, ROOT-OS-DEBIAN-11-CVE-2026-53159, ROOT-OS-DEBIAN-12-CVE-2026-53159, ROOT-OS-UBUNTU-2204-CVE-2026-53159, ROOT-OS-UBUNTU-2404-CVE-2026-53159, UBUNTU-CVE-2026-53159

## What is CVE-2026-53159?

CVE-2026-53159 is a high-severity vulnerability in Linux kernel, published on 25 Jun 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:

misc: fastrpc: fix DMA address corruption due to find_vma misuse

fastrpc_get_args() uses find_vma() to look up the VMA for a user-provided
pointer and compute a DMA address offset. When the address falls in a gap
before the returned VMA, (ptr & PAGE_MASK) - vma->vm_start underflows,
corrupting the DMA address sent to the DSP.

Replace find_vma() with vma_lookup(), which returns NULL when the address
is not contained within any VMA.

## Which versions are affected by CVE-2026-53159?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2026-53159?

Apply the vendor's patch.

## Is CVE-2026-53159 being exploited?

There is no known exploitation of CVE-2026-53159 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53159 and fix it if it is affected.

What it is: CVE-2026-53159 is a high-severity vulnerability in Linux kernel, published on 25 Jun 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-2026-53159 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-2026-53159/ (Markdown: https://insights.sbomify.com/CVE-2026-53159/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53159
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53159
- OSV: https://osv.dev/vulnerability/CVE-2026-53159

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-53159/
Summaries are generated and may contain mistakes; the official description above is the record.