SB2026050608 - Improper resource shutdown or release in Linux kernel bluetooth driver
Published: May 6, 2026
Security Bulletin ID
SB2026050608
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper resource shutdown or release (CVE-ID: CVE-2026-43069)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource shutdown or release in download_firmware() in the hci_ll bluetooth driver when processing invalid firmware content returned by request_firmware(). A local user can trigger the use of invalid firmware content to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/28904375d54b436a757641fb0331537778c0de5a
- https://git.kernel.org/stable/c/31148a7be723aa9f2e8fbd62424825ab8d577973
- https://git.kernel.org/stable/c/5213ef54528dd1ac79b846e30d8f72ce092794aa
- https://git.kernel.org/stable/c/95e8601af227b2b4390eecf8db6abdb9f6a91f17
- https://git.kernel.org/stable/c/9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074b
- https://git.kernel.org/stable/c/a7803df606a7d22e896b030f619e1d9d20ae0c6b
- https://git.kernel.org/stable/c/b2dfbf1b5ff192cefd49574b951a4af9ddd32213
- https://git.kernel.org/stable/c/e6d95488c8c964d1df0d3e1db44c958706311e86