Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ll: Fix firmware leak on error path Smatch reports: drivers/bluetooth/hci_ll.c:587 download_firmware() warn: 'fw' from request_firmware() not released on lines: 544. In download_firmware(), if request_firmware() succeeds but the returned firmware content is invalid (no data or zero size), the function returns without releasing the firmware, resulting in a resource leak. Fix this by calling release_firmware() before returning when request_firmware() succeeded but the firmware content is invalid.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/28904375d54b436a757641fb0331537778c0de5a Patch
- git.kernel.org/stable/c/31148a7be723aa9f2e8fbd62424825ab8d577973 Patch
- git.kernel.org/stable/c/5213ef54528dd1ac79b846e30d8f72ce092794aa Patch
- git.kernel.org/stable/c/95e8601af227b2b4390eecf8db6abdb9f6a91f17 Patch
- git.kernel.org/stable/c/9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074b Patch
- git.kernel.org/stable/c/a7803df606a7d22e896b030f619e1d9d20ae0c6b Patch
- git.kernel.org/stable/c/b2dfbf1b5ff192cefd49574b951a4af9ddd32213 Patch
- git.kernel.org/stable/c/e6d95488c8c964d1df0d3e1db44c958706311e86 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 13 November 2026
- CWE
- CWE-401
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.