Vulnerability details
CVE-2026-43019
Linux Linux
Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync
CVSS 3.1
7.8High
Official description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync hci_conn lookup and field access must be covered by hdev lock in set_cig_params_sync, otherwise it's possible it is freed concurrently. Take hdev lock to prevent hci_conn from being deleted or modified concurrently. Just RCU lock is not suitable here, as we also want to avoid "tearing" in the configuration.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 3a273cd0f47dd672d37736e623849374f9ab9ce9 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.6 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.4.16 ≤ v < 6.5 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.5.3 ≤ v < 6.6 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec ≤ v < 66d432e9b45bae7881ffcdb12cd8fd0bf254ef02 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec ≤ v < 7d568fede8eac91161a60b710aa920abe9b0fb9f | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec ≤ v < 7502c1cf303b69f71d085f5ff7251b0e1b0f09df | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec ≤ v < bad65b4b0a96139f023eadc28a33125963208449 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec ≤ v < a2639a7f0f5bf7d73f337f8f077c19415c62ed2c | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://git.kernel.org/stable/c/7502c1cf303b69f71d085f5ff7251b0e1b0f09df
- https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02
- https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f
- https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449
- https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c
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Details
- Published
- 2026-05-01
- Last updated
- 2026-10-19
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.1%
Probability of exploitation in 30 days
0.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')