CVE-2022-48703 thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR
A local attacker can cause a kernel crash via null pointer dereference in the int340x thermal driver when handling zero-length data vaults.
- 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-2022-48703?
CVE-2022-48703 is a medium-severity vulnerability in Linux kernel, published on 3 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:
thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR
In some case, the GDDV returns a package with a buffer which has zero length. It causes that kmemdup() returns ZERO_SIZE_PTR (0x10).
Then the data_vault_read() got NULL point dereference problem when accessing the 0x10 value in data_vault.
[ 71.024560] BUG: kernel NULL pointer dereference, address: 0000000000000010
This patch uses ZERO_OR_NULL_PTR() for checking ZERO_SIZE_PTR or NULL value in data_vault.
Weakness: CWE-476
Which versions are affected by CVE-2022-48703?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-48703?
Apply the vendor's patch.
Is CVE-2022-48703 being exploited?
There is no known exploitation of CVE-2022-48703 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-57755, DEBIAN-CVE-2022-48703, GHSA-5w96-cqcp-75r4, ROOT-OS-DEBIAN-11-CVE-2022-48703, ROOT-OS-UBUNTU-2204-CVE-2022-48703, UBUNTU-CVE-2022-48703.