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In the Linux kernel, the following vulnerability has been resolved:
net: ibm: emac: mal: fix potential system hang in mal_remove()
napi_disable() is not idempotent and calling it on an already-disabled or unenabled NAPI context will cause the kernel to spin indefinitely waiting for the NAPI_STATE_SCHED bit to clear.
In mal_remove(), napi_disable() is called unconditionally. If no MACs were registered, NAPI was never enabled. Also, if they were registered but subsequently unregistered, NAPI was already disabled in mal_unregister_commac(). In either case, calling napi_disable() causes the kernel to hang upon module removal.
Fix this by only calling napi_disable() in mal_remove() if the commac list is not empty (which implies NAPI is enabled).
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.12Upgrade linux | Sep 30, 2026 | Sep 24, 2026 |
| Ubuntu | — | Upgrade linux-riscv-5.15Upgrade linux-gkeUpgrade linux-fipsUpgrade linux-realtimeUpgrade linux-oracleUpgrade linux-azure-5.15Upgrade linux-gcp-5.15Upgrade linux-kvmUpgrade linux-intel-iot-realtimeUpgrade linux-oracle-5.15Upgrade linux-riscvUpgrade linux-lowlatencyUpgrade linux-nvidiaUpgrade linux-gkeopUpgrade linux-intel-iotgUpgrade linux-oem-7.0Upgrade linux-azure-fde-5.15Upgrade linux-nvidia-tegraUpgrade linux-aws-5.15Upgrade linux-azure-fipsUpgrade linux-ibm-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-gcpUpgrade linux-bluefieldUpgrade linux-intel-iotg-5.15Upgrade linux-hwe-5.15Upgrade linuxUpgrade linux-lowlatency-hwe-5.15Upgrade linux-gcp-fipsUpgrade linux-nvidia-tegra-igxUpgrade linux-azure-fdeUpgrade linux-azureUpgrade linux-awsUpgrade linux-riscv-7.0Upgrade linux-ibmUpgrade linux-aws-fipsUpgrade linux-hwe-7.0 | Nov 3, 2026 | Sep 24, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2026 | Sep 24, 2026 |
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