# CVE-2026-98146: accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain

CVE-2026-98146 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98146 (version 7.2.7-1), released October 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-98146
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0009
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 25, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98146

## Description

In the Linux kernel, the following vulnerability has been resolved:  accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain  struct amdxdna_cmd_chain contains a flexible array annotated with __counted_by(command_count). Since the structure is stored in shared AMDXDNA_BO_SHARE memory, userspace can modify command_count concurrently. If command_count is changed to zero, the bounds check generated from __counted_by may fail and trigger a kernel panic.  Remove __counted_by to avoid relying on the userspace-controlled command_count for the flexible array bounds check.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.7-1 | [DEBIAN-CVE-2026-98146](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98146.md) | Oct 2, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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