Vulnerability details
CVE-2026-46056
Linux LinuxSiemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVSS 3.1
8.8High
Official description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage in both handlers. Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 3.7 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 92a25256f142d55e25f9959441cea6ddeabae57e ≤ v < d28311539ac9f65e29308ea219ecaa48aa5e76e5 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 92a25256f142d55e25f9959441cea6ddeabae57e ≤ v < b6ae482f88654db407c8c17619d4b62959b903ef | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 92a25256f142d55e25f9959441cea6ddeabae57e ≤ v < 204028af77a265e31ceb4ba7f643349a3cca72b2 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 92a25256f142d55e25f9959441cea6ddeabae57e ≤ v < 01a6431766c35dfedb86e0cb5d3fc80c6d604a47 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 92a25256f142d55e25f9959441cea6ddeabae57e ≤ v < e08d75753db17aa943d7622f09d9c217b5bfd3b8 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 92a25256f142d55e25f9959441cea6ddeabae57e ≤ v < 8c6443bb9257b780986fb67ec08565bf48ecb8d7 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 92a25256f142d55e25f9959441cea6ddeabae57e ≤ v < 85fa3512048793076eef658f66489112dcc91993 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 92a25256f142d55e25f9959441cea6ddeabae57e ≤ v < ea18732d2614557e59f4c0d8cdbe6611aeab33b7 | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | All | CVEProject cvelistV5 (CNA) |
References and advisories
9- https://git.kernel.org/stable/c/ea18732d2614557e59f4c0d8cdbe6611aeab33b7
- https://git.kernel.org/stable/c/d28311539ac9f65e29308ea219ecaa48aa5e76e5
- https://git.kernel.org/stable/c/b6ae482f88654db407c8c17619d4b62959b903ef
- https://git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2
- https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47
- https://git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8
- https://git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7
- https://git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
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Details
- Published
- 2026-05-27
- Last updated
- 2026-10-19
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.28%
Probability of exploitation in 30 days
20.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-416Use After Free