What’s Vulnerable › Vulnerabilities

CVE-2026-93052: misc: bcm-vk: Use acquire/release for msgq_inited

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

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.

Affected products

• Linux kernel: 5.12 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

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

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