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CVE-2026-74461: i2c: imx: Cancel hrtimer before clearing slave pointer

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

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 products

• Linux kernel: 5.11 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/470fe15fb3bb2eba6629be301ca7e991ee3cfb7e
• https://git.kernel.org/stable/c/6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061f
• https://git.kernel.org/stable/c/753060f2b77ff2f386addbd3ecadb95b9f90cddd
• https://git.kernel.org/stable/c/a8a1f9ac3d763e721586f15479ef9140b216ddf3
• https://git.kernel.org/stable/c/affd62f5719a78135b7441aa49c8cab3c3b5e838
• https://git.kernel.org/stable/c/dab4762ee7f3fd0a01980d5407ba48d0261d3bff
• https://git.kernel.org/stable/c/e3da77bdb4015051656bb472c295656bbea03b6f

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