Description

In the Linux kernel, the following vulnerability has been resolved:

gpio: graniterapids: Fix vGPIO driver crash

Move setting irq_chip.name from probe() function to the initialization
of "irq_chip" struct in order to fix vGPIO driver crash during bootup.

Crash was caused by unauthorized modification of irq_chip.name field
where irq_chip struct was initialized as const.

This behavior is a consequence of suboptimal implementation of
gpio_irq_chip_set_chip(), which should be changed to avoid
casting away const qualifier.

Crash log:
BUG: unable to handle page fault for address: ffffffffc0ba81c0
/#PF: supervisor write access in kernel mode
/#PF: error_code(0x0003) - permissions violation
CPU: 33 UID: 0 PID: 1075 Comm: systemd-udevd Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7 #1
Hardware name: Intel Corporation Kaseyville RP/Kaseyville RP, BIOS KVLDCRB1.PGS.0026.D73.2410081258 10/08/2024
RIP: 0010:gnr_gpio_probe+0x171/0x220 [gpio_graniterapids]

Classification

CVE ID: CVE-2024-56671

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 11.48% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/e631cab10c6b287a33c35953e6dbda1f7f89bc1f
https://git.kernel.org/stable/c/eb9640fd1ce666610b77f5997596e9570a36378f

Timeline