Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers Commit 302a1f674c00 ("Bluetooth: MGMT: Fix possible UAFs") introduced mgmt_pending_valid(), which not only validates the pending command but also unlinks it from the pending list if it is valid. This change in semantics requires updates to several completion handlers to avoid list corruption and memory safety issues. This patch addresses two left-over issues from the aforementioned rework: 1. In mgmt_add_adv_patterns_monitor_complete(), mgmt_pending_remove() is replaced with mgmt_pending_free() in the success path. Since mgmt_pending_valid() already unlinks the command at the beginning of the function, calling mgmt_pending_remove() leads to a double list_del() and subsequent list corruption/kernel panic. 2. In set_mesh_complete(), the use of mgmt_pending_foreach() in the error path is removed. Since the current command is already unlinked by mgmt_pending_valid(), this foreach loop would incorrectly target other pending mesh commands, potentially freeing them while they are still being processed concurrently (leading to UAFs). The redundant mgmt_cmd_status() is also simplified to use cmd->opcode directly.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 6.6.140 to before 6.6.160; 6.12.59 to before 6.12.78; 6.16.10 to before 6.17 | 6.6.160, 6.12.78, 6.17 | Patch available | CNA |
| Linux | Linux | 6.17 and later | 6.6.160, 6.12.78, 6.18.20, 6.19.10, 7.0 | Patch available | CNA |
- Linux VendorLinux Affected 6.6.140 to before 6.6.160; 6.12.59 to before 6.12.78; 6.16.10 to before 6.17 Fixed in 6.6.160, 6.12.78, 6.17 Patch available CNA
- Linux VendorLinux Affected 6.17 and later Fixed in 6.6.160, 6.12.78, 6.18.20, 6.19.10, 7.0 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.6.140 to before 6.7; 6.12.59 to before 6.12.78; 6.16.10 to before 6.17; 6.17.1 to before 6.18.20; 6.19 to before 6.19.10 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:-:*:*:*:*:*:* | 6.17 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | 7.0 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | 7.0 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | 7.0 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* | 7.0 rc4 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.6.140 to before 6.7; 6.12.59 to before 6.12.78; 6.16.10 to before 6.17; 6.17.1 to before 6.18.20; 6.19 to before 6.19.10 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:-:*:*:*:*:*:* Versions 6.17 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* Versions 7.0 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* Versions 7.0 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* Versions 7.0 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* Versions 7.0 rc4 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.78, 6.17
- Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.78, 6.18.20, 6.19.10, 7.0
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2026-43059
- 2026-10-03 Alias added: GHSA-9xxq-2x8g-75gf
- 2026-10-21 Fix available: Linux/Linux@3d6de8467236cd763ddc7d06127689bdfbfbd8ff, Linux/[email protected] · CNA
- 2026-10-21 1 new reference · CNA
- 2026-11-06 CISA SSVC decision points changed
References
Patch 4
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Sources
- CVE-2026-43059 · CVE Program
- CVE-2026-43059 · NVD
- FIRST EPSS
- GHSA-9xxq-2x8g-75gf · GitHub Advisory Database · CC BY 4.0
- CVE-2026-43059 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences