CVE-2024-35984 i2c: smbus: fix NULL function pointer dereference
A local attacker can cause a kernel crash by using the designware I2C controller in target-only mode, leading to a 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-2024-35984?
CVE-2024-35984 is a medium-severity vulnerability in Linux kernel, published on 20 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:
i2c: smbus: fix NULL function pointer dereference
Baruch reported an OOPS when using the designware controller as target only. Target-only modes break the assumption of one transfer function always being available. Fix this by always checking the pointer in __i2c_transfer.
[wsa: dropped the simplification in core-smbus to avoid theoretical regressions]
Weakness: CWE-476
Which versions are affected by CVE-2024-35984?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-35984?
Apply the vendor's patch.
Is CVE-2024-35984 being exploited?
There is no known exploitation of CVE-2024-35984 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-42172, AZL-42213, BELL-CVE-2024-35984, DEBIAN-CVE-2024-35984, GHSA-qm84-fc6x-gw47, UBUNTU-CVE-2024-35984.