# CVE-2025-40131: linux: In the Linux kernel, the following vulnerability has been resolved:  wifi: ath12k: Fix peer lookup in ath12k_dp_mon_r...

CVE-2025-40131 is fixed in linux on 1 platform by DEBIAN-CVE-2025-40131 (version 6.17.6-1), released November 12, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-40131
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 12, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  wifi: ath12k: Fix peer lookup in ath12k_dp_mon_rx_deliver_msdu()  In ath12k_dp_mon_rx_deliver_msdu(), peer lookup fails because rxcb->peer_id is not updated with a valid value. This is expected in monitor mode, where RX frames bypass the regular RX descriptor path that typically sets rxcb->peer_id. As a result, the peer is NULL, and link_id and link_valid fields in the RX status are not populated. This leads to a WARN_ON in mac80211 when it receives data frame from an associated station with invalid link_id.  Fix this potential issue by using ppduinfo->peer_id, which holds the correct peer id for the received frame. This ensures that the peer is correctly found and the associated link metadata is updated accordingly.  Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-40131](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40131.md) | Nov 12, 2025 |

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