# CVE-2026-72449: drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm

> An unprivileged user can trigger a use-after-free and double-free in the AMD KFD driver, potentially leading to code execution or privilege escalation.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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:** 15 Aug 2026
- **Updated:** 16 Oct 2026
- **Also known as:** BELL-CVE-2026-72449, DEBIAN-CVE-2026-72449, GHSA-xgpc-q5wr-q4v5, UBUNTU-CVE-2026-72449

## What is CVE-2026-72449?

CVE-2026-72449 is a high-severity use after free 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:

drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm

The cleanup tail of kfd_criu_resume_svm() walks
svms->criu_svm_metadata_list and kfree()s each struct criu_svm_metadata
without removing it from the list. The list head is left pointing at
freed kmalloc-96 objects.

A second AMDKFD_IOC_CRIU_OP from the same process re-enters: list_empty()
reads the dangling ->next (use-after-free), the loop walks freed entries,
and each is kfree()'d again (double-free). This is reachable by an
unprivileged render-group user via /dev/kfd with no capabilities required.

Add list_del() before the kfree() so the list is properly emptied. The
list_for_each_entry_safe() iterator already caches the next pointer, so
unlinking during the walk is safe.

(cherry picked from commit 6322d278a298e2c1430b9d2697743d3a04b788b1)

## Which versions are affected by CVE-2026-72449?


## How do I fix CVE-2026-72449?

Apply the vendor's patch.

## Is CVE-2026-72449 being exploited?

There is no known exploitation of CVE-2026-72449 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-72449 and fix it if it is affected.

What it is: CVE-2026-72449 is a high-severity use after free 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-2026-72449 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-2026-72449/ (Markdown: https://insights.sbomify.com/CVE-2026-72449/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-72449
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72449
- OSV: https://osv.dev/vulnerability/CVE-2026-72449

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-72449/
Summaries are generated and may contain mistakes; the official description above is the record.