Advisory Published
Updated

CVE-2024-56543: wifi: ath12k: Skip Rx TID cleanup for self peer

First published: Fri Dec 27 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Skip Rx TID cleanup for self peer During peer create, dp setup for the peer is done where Rx TID is updated for all the TIDs. Peer object for self peer will not go through dp setup. When core halts, dp cleanup is done for all the peers. While cleanup, rx_tid::ab is accessed which causes below stack trace for self peer. WARNING: CPU: 6 PID: 12297 at drivers/net/wireless/ath/ath12k/dp_rx.c:851 Call Trace: __warn+0x7b/0x1a0 ath12k_dp_rx_frags_cleanup+0xd2/0xe0 [ath12k] report_bug+0x10b/0x200 handle_bug+0x3f/0x70 exc_invalid_op+0x13/0x60 asm_exc_invalid_op+0x16/0x20 ath12k_dp_rx_frags_cleanup+0xd2/0xe0 [ath12k] ath12k_dp_rx_frags_cleanup+0xca/0xe0 [ath12k] ath12k_dp_rx_peer_tid_cleanup+0x39/0xa0 [ath12k] ath12k_mac_peer_cleanup_all+0x61/0x100 [ath12k] ath12k_core_halt+0x3b/0x100 [ath12k] ath12k_core_reset+0x494/0x4c0 [ath12k] sta object in peer will be updated when remote peer is created. Hence use peer::sta to detect the self peer and skip the cleanup. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux kernel
Qualcomm QCN9274
Qualcomm WCN7850

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Frequently Asked Questions

  • What is the severity of CVE-2024-56543?

    CVE-2024-56543 has a severity rating that may impact system security depending on the configuration and usage.

  • How do I fix CVE-2024-56543?

    To fix CVE-2024-56543, ensure that you apply the latest patches provided for the affected Linux kernel and Qualcomm products.

  • Which versions of Linux kernel are affected by CVE-2024-56543?

    CVE-2024-56543 affects various versions of the Linux kernel involved in the functionality of the ath12k driver.

  • Is CVE-2024-56543 related to specific Qualcomm hardware?

    Yes, CVE-2024-56543 impacts Qualcomm devices such as the QCN9274 and WCN7850 modules.

  • What kind of vulnerability is CVE-2024-56543?

    CVE-2024-56543 is a vulnerability within the Linux kernel's handling of the ath12k WiFi driver impacting peer setup.

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