CVE-2026-68389

Published: August 12, 2026Last modified: August 14, 2026

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: Clear memdump state on invalid dump size qca_controller_memdump() allocates qca->qca_memdump before processing the first dump packet. For a sequence-zero packet it then disables IBS, marks memdump collection active, and reads the advertised dump size. If the controller reports a zero dump size, the error path frees the local qca_memdump object and returns without clearing qca->qca_memdump or undoing the collection state. A later memdump work item initializes its local pointer from qca->qca_memdump and skips allocation when that pointer is non-NULL, so it can operate on freed memory. The stale collection and IBS-disabled flags can also leave waiters or later transmit handling blocked behind an aborted dump. Clear the saved pointer and memdump state before returning from the invalid-size path, matching the cleanup used when hci_devcd_init() fails. A static analysis checker reported the stale memdump state, and manual source review confirmed the invalid-size failure path.

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References

• https://git.kernel.org/stable/c/069258d5111eed9ac9586bee42d03d38e2975715
• https://git.kernel.org/stable/c/2363a757694752426fc47f3eadde15cf5f791fa5
• https://git.kernel.org/stable/c/5a3945e8dea6c9a8ec9e981169ac9487e1d6ad6a
• https://git.kernel.org/stable/c/bf587a10c33e5571a299742e45bc18960b9912e7
• https://git.kernel.org/stable/c/cefb44c367b2b52e50f97bc8526d39df9bcf5e60