Linux Kernel up to 6.19.10 Bluetooth hci_ll.c download_firmware memory leak

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.19.10. This issue affects the function download_firmware of the file drivers/bluetooth/hci_ll.c of the component Bluetooth. The manipulation results in an unknown weakness. This vulnerability is known as CVE-2026-43069. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.19.10. Affected is the function download_firmware of the file drivers/bluetooth/hci_ll.c of the component Bluetooth. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-43069 since 05/01/2026. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/08/2026).

The vulnerability scanner Nessus provides a plugin with the ID 312310 (Linux Distros Unpatched Vulnerability : CVE-2026-43069), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.253, 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21 or 6.19.11 eliminates this vulnerability. Applying the patch 95e8601af227b2b4390eecf8db6abdb9f6a91f17/e6d95488c8c964d1df0d3e1db44c958706311e86/b2dfbf1b5ff192cefd49574b951a4af9ddd32213/28904375d54b436a757641fb0331537778c0de5a/5213ef54528dd1ac79b846e30d8f72ce092794aa/9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074b/a7803df606a7d22e896b030f619e1d9d20ae0c6b/31148a7be723aa9f2e8fbd62424825ab8d577973 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (312310) and CERT Bund (WID-SEC-2026-1385). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Microsoft Azure Linux

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 312310
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-43069

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.253/5.15.203/6.1.168/6.6.131/6.12.80/6.18.21/6.19.11
Patch: 95e8601af227b2b4390eecf8db6abdb9f6a91f17/e6d95488c8c964d1df0d3e1db44c958706311e86/b2dfbf1b5ff192cefd49574b951a4af9ddd32213/28904375d54b436a757641fb0331537778c0de5a/5213ef54528dd1ac79b846e30d8f72ce092794aa/9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074b/a7803df606a7d22e896b030f619e1d9d20ae0c6b/31148a7be723aa9f2e8fbd62424825ab8d577973

Timelineinfo

05/01/2026 CVE reserved
05/05/2026 +4 days Advisory disclosed
05/05/2026 +0 days VulDB entry created
06/08/2026 +34 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-43069 (🔒)
GCVE (CVE): GCVE-0-2026-43069
GCVE (VulDB): GCVE-100-361200
CERT Bund: WID-SEC-2026-1385 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 05/05/2026 19:11
Updated: 06/08/2026 13:13
Changes: 05/05/2026 19:11 (59), 05/06/2026 11:30 (2), 05/06/2026 22:08 (7), 06/01/2026 04:42 (13), 06/08/2026 13:13 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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