CVE-2026-74461

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf7414cd6923fd7f78e57086fc964ba2dc25db5c1 < a8a1f9ac3d763e721586f15479ef9140b216ddf3affected
LinuxLinuxf7414cd6923fd7f78e57086fc964ba2dc25db5c1 < 753060f2b77ff2f386addbd3ecadb95b9f90cdddaffected
LinuxLinuxf7414cd6923fd7f78e57086fc964ba2dc25db5c1 < affd62f5719a78135b7441aa49c8cab3c3b5e838affected
LinuxLinuxf7414cd6923fd7f78e57086fc964ba2dc25db5c1 < dab4762ee7f3fd0a01980d5407ba48d0261d3bffaffected
LinuxLinuxf7414cd6923fd7f78e57086fc964ba2dc25db5c1 < 6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061faffected
LinuxLinux5.11affected
LinuxLinux0 < 5.11unaffected
LinuxLinux6.6.151 <= 6.6.*unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2-rc6 <= *unaffected

Weaknesses

References