CVE-2024-42279 spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer
A flaw in the Linux kernel SPI driver allows reading stale data from previous transfers, potentially disclosing sensitive information.
- 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-2024-42279?
CVE-2024-42279 is a high-severity vulnerability in Linux kernel, published on 17 Aug 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:
spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer
While transmitting with rx_len == 0, the RX FIFO is not going to be emptied in the interrupt handler. A subsequent transfer could then read crap from the previous transfer out of the RX FIFO into the start RX buffer. The core provides a register that will empty the RX and TX FIFOs, so do that before each transfer.
Which versions are affected by CVE-2024-42279?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-42279?
Apply the vendor's patch.
Is CVE-2024-42279 being exploited?
There is no known exploitation of CVE-2024-42279 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-42279, DEBIAN-CVE-2024-42279, GHSA-g2mq-v2g4-xgcx, ROOT-OS-DEBIAN-12-CVE-2024-42279, UBUNTU-CVE-2024-42279.