CVE-2024-47673 wifi: iwlwifi: mvm: pause TCM when the firmware is stopped
A missing state check in the iwlwifi driver causes a kernel warning and potential crash when sending commands to stopped firmware, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-47673?
CVE-2024-47673 is a medium-severity denial of service vulnerability in Linux kernel, published on 9 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mvm: pause TCM when the firmware is stopped
Not doing so will make us send a host command to the transport while the firmware is not alive, which will trigger a WARNING.
bad state = 0 WARNING: CPU: 2 PID: 17434 at drivers/net/wireless/intel/iwlwifi/iwl-trans.c:115 iwl_trans_send_cmd+0x1cb/0x1e0 [iwlwifi] RIP: 0010:iwl_trans_send_cmd+0x1cb/0x1e0 [iwlwifi] Call Trace: <TASK> iwl_mvm_send_cmd+0x40/0xc0 [iwlmvm] iwl_mvm_config_scan+0x198/0x260 [iwlmvm] iwl_mvm_recalc_tcm+0x730/0x11d0 [iwlmvm] iwl_mvm_tcm_work+0x1d/0x30 [iwlmvm] process_one_work+0x29e/0x640 worker_thread+0x2df/0x690 ? rescuer_thread+0x540/0x540 kthread+0x192/0x1e0 ? set_kthread_struct+0x90/0x90 ret_from_fork+0x22/0x30
Which versions are affected by CVE-2024-47673?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-47673?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-47673 being exploited?
There is no known exploitation of CVE-2024-47673 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-50730, AZL-50984, BELL-CVE-2024-47673, DEBIAN-CVE-2024-47673, GHSA-2cfj-58rp-82cv, ROOT-OS-DEBIAN-11-CVE-2024-47673 and 1 more.