# CVE-2024-53071: drm/panthor: Be stricter about IO mapping flags

> A flaw in the Linux kernel Panthor GPU driver allows userspace to bypass write restrictions or trigger a kernel crash via improper memory mapping flags.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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:** 19 Nov 2024
- **Updated:** 11 May 2026
- **Also known as:** BELL-CVE-2024-53071, DEBIAN-CVE-2024-53071, GHSA-42c7-w7r7-3v3m, UBUNTU-CVE-2024-53071

## What is CVE-2024-53071?

CVE-2024-53071 is a medium-severity vulnerability in Linux kernel, published on 19 Nov 2024. 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:

drm/panthor: Be stricter about IO mapping flags

The current panthor_device_mmap_io() implementation has two issues:

1. For mapping DRM_PANTHOR_USER_FLUSH_ID_MMIO_OFFSET,
   panthor_device_mmap_io() bails if VM_WRITE is set, but does not clear
   VM_MAYWRITE. That means userspace can use mprotect() to make the mapping
   writable later on. This is a classic Linux driver gotcha.
   I don't think this actually has any impact in practice:
   When the GPU is powered, writes to the FLUSH_ID seem to be ignored; and
   when the GPU is not powered, the dummy_latest_flush page provided by the
   driver is deliberately designed to not do any flushes, so the only thing
   writing to the dummy_latest_flush could achieve would be to make *more*
   flushes happen.

2. panthor_device_mmap_io() does not block MAP_PRIVATE mappings (which are
   mappings without the VM_SHARED flag).
   MAP_PRIVATE in combination with VM_MAYWRITE indicates that the VMA has
   copy-on-write semantics, which for VM_PFNMAP are semi-supported but
   fairly cursed.
   In particular, in such a mapping, the driver can only install PTEs
   during mmap() by calling remap_pfn_range() (because remap_pfn_range()
   wants to **store the physical address of the mapped physical memory into
   the vm_pgoff of the VMA**); installing PTEs later on with a fault
   handler (as panthor does) is not supported in private mappings, and so
   if you try to fault in such a mapping, vmf_insert_pfn_prot() splats when
   it hits a BUG() check.

Fix it by clearing the VM_MAYWRITE flag (userspace writing to the FLUSH_ID
doesn't make sense) and requiring VM_SHARED (copy-on-write semantics for
the FLUSH_ID don't make sense).

Reproducers for both scenarios are in the notes of my patch on the mailing
list; I tested that these bugs exist on a Rock 5B machine.

Note that I only compile-tested the patch, I haven't tested it; I don't
have a working kernel build setup for the test machine yet. Please test it
before applying it.

## Which versions are affected by CVE-2024-53071?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2024-53071?

Apply the vendor's patch.

## Is CVE-2024-53071 being exploited?

There is no known exploitation of CVE-2024-53071 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-2024-53071 and fix it if it is affected.

What it is: CVE-2024-53071 is a medium-severity vulnerability in Linux kernel, published on 19 Nov 2024. 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-2024-53071 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-2024-53071/ (Markdown: https://insights.sbomify.com/CVE-2024-53071/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-53071
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-53071
- OSV: https://osv.dev/vulnerability/CVE-2024-53071

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-53071/
Summaries are generated and may contain mistakes; the official description above is the record.