CVE-2026-93052

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux111d746bb4767ad476f80fe49067e3df3d9a9375 < bab66a9e30e39a06f3463b19f8c704386dfd5268affected
LinuxLinux111d746bb4767ad476f80fe49067e3df3d9a9375 < 679cfada6868723ccf162ec3b78c7402ff2405bfaffected
LinuxLinux111d746bb4767ad476f80fe49067e3df3d9a9375 < f7a8f4cbc8cede0be55220367dc52b126e2d39e5affected
LinuxLinux111d746bb4767ad476f80fe49067e3df3d9a9375 < 1df3926ed8771edf286ff753428b243f334e6041affected
LinuxLinux111d746bb4767ad476f80fe49067e3df3d9a9375 < a45d6dd3c11e921882a2e74c7c8710b975f2eaa7affected
LinuxLinux111d746bb4767ad476f80fe49067e3df3d9a9375 < 4984277bc43f84d7506346a09b29af138246d54aaffected
LinuxLinux111d746bb4767ad476f80fe49067e3df3d9a9375 < 61b101c6a150057b6d512421ed108aed16e822eaaffected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References