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CVE-2026-43007

accel/qaic: Handle DBC deactivation if the owner went away PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: accel/qaic: Handle DBC deactivation if the owner went away When a DBC is released, the device sends a QAIC_TRANS_DEACTIVATE_FROM_DEV transaction to the host over the QAIC_CONTROL MHI channel. QAIC handles this by calling decode_deactivate() to release the resources allocated for that DBC. Since that handling is done in the qaic_manage_ioctl() context, if the user goes away before receiving and handling the deactivation, the host will be out-of-sync with the DBCs available for use, and the DBC resources will not be freed unless the device is removed. If another user loads and requests to activate a network, then the device assigns the same DBC to that network, QAIC will "indefinitely" wait for dbc->in_use = false, leading the user process to hang. As a solution to this, handle QAIC_TRANS_DEACTIVATE_FROM_DEV transactions that are received after the user has gone away.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 129776ac2e38231fa9c02ce20e116c99de291666 before 2dd67966f39a2abf8ccb4865031c722e40e01b7f; affected 129776ac2e38231fa9c02ce20e116c99de291666 before 08021f2d4a557d6491e3bcc288e96425f50aa3cf; affected 129776ac2e38231fa9c02ce20e116c99de291666 before f403094d9075d7c565a3d81002b781c325cb3c07; affected 129776ac2e38231fa9c02ce20e116c99de291666 before ee0180e77e6c8482644569632065411de844c515; affected 129776ac2e38231fa9c02ce20e116c99de291666 before 2feec5ae5df785658924ab6bd91280dc3926507c
Linux / Linuxaffected 6.4; unaffected 0 before 6.4; unaffected 6.6.134 through 6.6.*; unaffected 6.12.81 through 6.12.*; unaffected 6.18.22 through 6.18.*; unaffected 6.19.12 through 6.19.*; unaffected 7.0 through *

CWE

No CWE identifiers supplied.

References