CVE-2024-35790 usb: typec: altmodes/displayport: create sysfs nodes as driver's default device attribute group
A race condition in the Linux kernel DisplayPort driver allows local attackers to cause a denial of service via NULL pointer dereference during device initialization.
- 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-2024-35790?
CVE-2024-35790 is a medium-severity vulnerability in Linux kernel, published on 17 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:
usb: typec: altmodes/displayport: create sysfs nodes as driver's default device attribute group
The DisplayPort driver's sysfs nodes may be present to the userspace before typec_altmode_set_drvdata() completes in dp_altmode_probe. This means that a sysfs read can trigger a NULL pointer error by deferencing dp->hpd in hpd_show or dp->lock in pin_assignment_show, as dev_get_drvdata() returns NULL in those cases.
Remove manual sysfs node creation in favor of adding attribute group as default for devices bound to the driver. The ATTRIBUTE_GROUPS() macro is not used here otherwise the path to the sysfs nodes is no longer compliant with the ABI.
Weakness: CWE-476
Which versions are affected by CVE-2024-35790?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-35790?
Apply the vendor's patch.
Is CVE-2024-35790 being exploited?
There is no known exploitation of CVE-2024-35790 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-57802, BELL-CVE-2024-35790, DEBIAN-CVE-2024-35790, GHSA-xq4p-6j59-jfv4, ROOT-OS-DEBIAN-11-CVE-2024-35790, ROOT-OS-DEBIAN-12-CVE-2024-35790 and 2 more.