CVE-2021-28972 Memory corruption in n/a
A buffer overflow in the Linux kernel RPA PCI Hotplug driver allows local users to write to kernel stack memory, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-28972?
CVE-2021-28972 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 22 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In drivers/pci/hotplug/rpadlpar_sysfs.c in the Linux kernel through 5.11.8, the RPA PCI Hotplug driver has a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly. This occurs because add_slot_store and remove_slot_store mishandle drc_name '\0' termination, aka CID-cc7a0bb058b8.
Weakness: CWE-120
Which versions are affected by CVE-2021-28972?
It affects 5 products.
Products include Fedoraproject Fedora, Linux kernel, Netapp Cloud Backup, Netapp Fas\/Aff Baseboard Management Controller, Netapp Solidfire Baseboard Management Controller Firmware.
How do I fix CVE-2021-28972?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-28972 being exploited?
There is no known exploitation of CVE-2021-28972 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as AZL-6543, DEBIAN-CVE-2021-28972, GHSA-22g7-8p7v-6gr8, UBUNTU-CVE-2021-28972.