CVE-2026-93052

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.

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