CVE-2026-74461
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
In the Linux kernel, in the i2c: imx driver, a problem was found where the hrtimer was not canceled before clearing the slave pointer. In i2c_imx_unreg_slave(), the slave pointer is set to NULL after disabling interrupts, but a pending interrupt might have already started the hrtimer. If the hrtimer fires after slave is set to NULL, it can lead to use-after-free or NULL pointer dereference. The fix cancels the hrtimer and waits for it to complete before clearing the slave pointer.
Risk Assessment
The vulnerability could lead to system crash or potentially kernel code execution, posing a serious security risk.
Recommendation
Apply the Linux kernel update containing the fix for CVE-2026-74461.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: i2c: imx: Cancel hrtimer before clearing slave pointer In i2c_imx_unreg_slave(), the slave pointer is set to NULL after disabling interrupts. However, a pending interrupt might already have started the hrtimer (i2c_imx_slave_timeout) before the pointer was cleared. If the hrtimer fires after i2c_imx->slave is set to NULL, the timer callback i2c_imx_slave_finish_op() will call i2c_imx_slave_event() with a NULL slave pointer, which results in a use-after-free / NULL pointer dereference. Fix by canceling the hrtimer and waiting for it to complete after disabling interrupts, before clearing the slave pointer.