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).
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= aac243092b707bb3018e951d470cc1a9bcbaba6c, < 241cf3b7455bebbe492b9df4912b48e3260061d4; >= aac243092b707bb3018e951d470cc1a9bcbaba6c, < fff6509d976f6fae423a5236391ccdbd7e0e9f06; >= aac243092b707bb3018e951d470cc1a9bcbaba6c, < 261c1fe3327ad24508f54552c6366e3e4db82c15 |
| Linux | Linux | 6.14 |
References
Timeline
- Published
- Aug 15, 2026
- Last modified
- Oct 15, 2026
- NVD status
- Received