CVE-2024-27002 clk: mediatek: Do a runtime PM get on controllers during probe
A deadlock in the MediaTek clock driver during probe causes a system hang, requiring a kernel patch to resolve the locking order issue.
- 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-2024-27002?
CVE-2024-27002 is a medium-severity vulnerability in Linux kernel, published on 1 May 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:
clk: mediatek: Do a runtime PM get on controllers during probe
mt8183-mfgcfg has a mutual dependency with genpd during the probing stage, which leads to a deadlock in the following call stack:
CPU0: genpd_lock --> clk_prepare_lock genpd_power_off_work_fn() genpd_lock() generic_pm_domain::power_off() clk_unprepare() clk_prepare_lock()
CPU1: clk_prepare_lock --> genpd_lock clk_register() __clk_core_init() clk_prepare_lock() clk_pm_runtime_get() genpd_lock()
Do a runtime PM get at the probe function to make sure clk_register() won't acquire the genpd lock. Instead of only modifying mt8183-mfgcfg, do this on all mediatek clock controller probings because we don't believe this would cause any regression.
Verified on MT8183 and MT8192 Chromebooks.
Weakness: CWE-667
Which versions are affected by CVE-2024-27002?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-27002?
Apply the vendor's patch.
Is CVE-2024-27002 being exploited?
There is no known exploitation of CVE-2024-27002 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-54592, BELL-CVE-2024-27002, DEBIAN-CVE-2024-27002, GHSA-437h-4cv6-6q92, ROOT-OS-DEBIAN-11-CVE-2024-27002, ROOT-OS-UBUNTU-2204-CVE-2024-27002 and 1 more.