CVE-2022-48891 regulator: da9211: Use irq handler when ready
A null pointer dereference in the DA9211 regulator driver causes a kernel crash if an IRQ arrives before structures are initialized.
- 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-2022-48891?
CVE-2022-48891 is a medium-severity vulnerability in Linux kernel, published on 21 Aug 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:
regulator: da9211: Use irq handler when ready
If the system does not come from reset (like when it is kexec()), the regulator might have an IRQ waiting for us.
If we enable the IRQ handler before its structures are ready, we crash.
This patch fixes:
[ 1.141839] Unable to handle kernel read from unreadable memory at virtual address 0000000000000078 [ 1.316096] Call trace: [ 1.316101] blocking_notifier_call_chain+0x20/0xa8 [ 1.322757] cpu cpu0: dummy supplies not allowed for exclusive requests [ 1.327823] regulator_notifier_call_chain+0x1c/0x2c [ 1.327825] da9211_irq_handler+0x68/0xf8 [ 1.327829] irq_thread+0x11c/0x234 [ 1.327833] kthread+0x13c/0x154
Which versions are affected by CVE-2022-48891?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-48891?
Apply the vendor's patch.
Is CVE-2022-48891 being exploited?
There is no known exploitation of CVE-2022-48891 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-48891, GHSA-rfgm-jggp-w57r, UBUNTU-CVE-2022-48891.