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Linux vulnerability

In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: Clear affinity hint before calling ath11k_pcic_free_irq() in error path If a shared IRQ is used by the driver due to platform limitation, then the IRQ affinity hint is set right after the allocation of IRQ vectors in ath11k_pci_alloc_msi(). This does no harm unless one of the functions requesting the IRQ fails and attempt to free the IRQ. This results in the below warning: WARNING: CPU: 7 PID: 349 at kernel/irq/manage.c:1929 free_irq+0x278/0x29c Call trace: free_irq+0x278/0x29c ath11k_pcic_free_irq+0x70/0x10c [ath11k] ath11k_pci_probe+0x800/0x820 [ath11k_pci] local_pci_probe+0x40/0xbc The warning is due to not clearing the affinity hint before freeing the IRQs. So to fix this issue, clear the IRQ affinity hint before calling ath11k_pcic_free_irq() in the error path. The affinity will be cleared once again further down the error path due to code organization, but that does no harm. Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-05266-QCAHSTSWPLZ_V2_TO_X86-1

Published 16 Apr 2025Updated 14 Sep 20265 sources
CVSS 5.5
Overview Sources History

What happened

In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: Clear affinity hint before calling ath11k_pcic_free_irq() in error path If a shared IRQ is used by the driver due to platform limitation, then the IRQ affinity hint is set right after the allocation of IRQ vectors in ath11k_pci_alloc_msi(). This does no harm unless one of the functions requesting the IRQ fails and attempt to free the IRQ. This results in the below warning: WARNING: CPU: 7 PID: 349 at kernel/irq/manage.c:1929 free_irq+0x278/0x29c Call trace: free_irq+0x278/0x29c ath11k_pcic_free_irq+0x70/0x10c [ath11k] ath11k_pci_probe+0x800/0x820 [ath11k_pci] local_pci_probe+0x40/0xbc The warning is due to not clearing the affinity hint before freeing the IRQs. So to fix this issue, clear the IRQ affinity hint before calling ath11k_pcic_free_irq() in the error path. The affinity will be cleared once again further down the error path due to code organization, but that does no harm. Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-05266-QCAHSTSWPLZ_V2_TO_X86-1

Affected versions

Linux: e01b3400d641cb290742849331f0d22e1202538a through before 8d0519f511d93d675f61d6bfb45ffcc945af4b14 (git); d412d0ef300f28d698648cc7c19147ab413251fe through before 7493b9baf0e54b44caae46715aaa409a84bd9f4b (git); 39564b475ac5a589e6c22c43a08cbd283c295d2c through before 80dc5a2ce5b75d648e08549617f5c555d07ae43c (git); 39564b475ac5a589e6c22c43a08cbd283c295d2c through before 3fc42cfcc6e336f25dee79b34e57c4a63cd652a5 (git); 39564b475ac5a589e6c22c43a08cbd283c295d2c through before 68410c5bd381a81bcc92b808e7dc4e6b9ed25d11 (git); 5a9f55efa9333e3edb4826d945cfdd8356f6e269 (git); 6.1.63 through before 6.1.188 (semver); 6.6.2 through before 6.6.157 (semver); 6.5.12 through before 6.6 (semver); 6.7 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

No public PoC reference has passed the current publication threshold.

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