In the Linux kernel, the following vulnerability has been resolved:
drivers: staging: rtl8192e: Fix deadlock in rtllib_beacons_stop()
There is a deadlock in rtllib_beacons_stop(), which is shown below:
(Thread 1) | (Thread 2) | rtllib_send_beacon() rtllib_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | rtllib_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ...
We hold ieee->beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee->beacon_lock in position (2) of thread 2. As a result, rtllib_beacons_stop() will block forever.
This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-aws-hweUpgrade linux-intel-iotgUpgrade linux-raspiUpgrade linux-realtimeUpgrade linux-oracle-5.4Upgrade linux-hwe-5.15Upgrade linux-aws-5.4Upgrade linux-azure-fdeUpgrade linux-riscv-5.15Upgrade linux-bluefieldUpgrade linux-oracle-5.15Upgrade linux-azureUpgrade linux-gkeUpgrade linux-fipsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-lowlatencyUpgrade linux-aws-5.15Upgrade linux-gkeopUpgrade linux-hweUpgrade linux-azure-fipsUpgrade linux-intel-iotg-5.15Upgrade linux-ibm-5.4Upgrade linux-nvidiaUpgrade linux-gcpUpgrade linux-azure-fde-5.15Upgrade linux-gcp-5.4Upgrade linux-oracleUpgrade linuxUpgrade linux-hwe-5.4Upgrade linux-ibmUpgrade linux-aws-fipsUpgrade linux-iotUpgrade linux-awsUpgrade linux-gcp-4.15Upgrade linux-raspi-5.4Upgrade linux-azure-5.15Upgrade linux-gcp-fipsUpgrade linux-azure-5.4Upgrade linux-kvmUpgrade linux-azure-4.15 | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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