# CVE-2026-80657: linux: In the Linux kernel, the following vulnerability has been resolved:  accel/amdxdna: Guard management mailbox channel...

CVE-2026-80657 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80657 (version 7.1.5-1), released August 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-80657
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 28, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  accel/amdxdna: Guard management mailbox channel cleanup against NULL pointer  The management mailbox channel cleanup helpers can be called from error handling paths when mgmt_chann has already been destroyed.  Add NULL checks to xdna_mailbox_free_channel() and xdna_mailbox_stop_channel() so the cleanup path safely returns instead of dereferencing a NULL mailbox channel pointer.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-80657](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80657.md) | Aug 29, 2026 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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