CVE-2026-68389 is a vulnerability in Linux Kernel
Published on August 10, 2026
Bluetooth: hci_qca: Clear memdump state on invalid dump size
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.
Products Associated with CVE-2026-68389
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Affected Versions
Linux:- Version 06d3fdfcdf5cefb06f2024b9d3dad356779399cf and below 5a3945e8dea6c9a8ec9e981169ac9487e1d6ad6a is affected.
- Version 06d3fdfcdf5cefb06f2024b9d3dad356779399cf and below 069258d5111eed9ac9586bee42d03d38e2975715 is affected.
- Version 06d3fdfcdf5cefb06f2024b9d3dad356779399cf and below cefb44c367b2b52e50f97bc8526d39df9bcf5e60 is affected.
- Version 06d3fdfcdf5cefb06f2024b9d3dad356779399cf and below 2363a757694752426fc47f3eadde15cf5f791fa5 is affected.
- Version 06d3fdfcdf5cefb06f2024b9d3dad356779399cf and below bf587a10c33e5571a299742e45bc18960b9912e7 is affected.
- Version 6.6 is affected.
- Before 6.6 is unaffected.
- Version 6.6.148, <= 6.6.* is unaffected.
- Version 6.12.101, <= 6.12.* is unaffected.
- Version 6.18.42, <= 6.18.* is unaffected.
- Version 7.1.6, <= 7.1.* is unaffected.
- Version 7.2-rc4, <= * is unaffected.