CVE-2024-47667 PCI: keystone: Add workaround for Errata #i2037 (AM65x SR 1.0)
A hardware errata in specific TI processors can cause system hangs when processing large PCIe packets, requiring a kernel workaround to limit payload sizes.
- 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-2024-47667?
CVE-2024-47667 is a high-severity denial of service vulnerability in Linux kernel, published on 9 Oct 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:
PCI: keystone: Add workaround for Errata #i2037 (AM65x SR 1.0)
Errata #i2037 in AM65x/DRA80xM Processors Silicon Revision 1.0 (SPRZ452D_July 2018_Revised December 2019 [1]) mentions when an inbound PCIe TLP spans more than two internal AXI 128-byte bursts, the bus may corrupt the packet payload and the corrupt data may cause associated applications or the processor to hang.
The workaround for Errata #i2037 is to limit the maximum read request size and maximum payload size to 128 bytes. Add workaround for Errata #i2037 here.
The errata and workaround is applicable only to AM65x SR 1.0 and later versions of the silicon will have this fixed.
[1] -> https://www.ti.com/lit/er/sprz452i/sprz452i.pdf
Which versions are affected by CVE-2024-47667?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-47667?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-47667 being exploited?
There is no known exploitation of CVE-2024-47667 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-47667, DEBIAN-CVE-2024-47667, GHSA-9jfw-gm57-mv43, ROOT-OS-DEBIAN-11-CVE-2024-47667, UBUNTU-CVE-2024-47667.