Answer in brief
CVE-2026-43019 records a High severity (CVSS 7.8) vulnerability in Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a091289218202bc09d9b9caa8afcde1018584aec <7502c1cf303b69f71d085f5ff7251b0e1b0f09df || >=a091289218202bc09d9b9caa8afcde1018584aec <66d432e9b45bae7881ffcdb12cd8fd0bf254ef02 || >=a091289218202bc09d9b9caa8afcde1018584aec <7d568fede8eac91161a60b710aa920abe9b0fb9f || >=a091289218202bc09d9b9caa8afcde1018584aec <bad65b4b0a96139f023eadc28a33125963208449 || >=a091289218202bc09d9b9caa8afcde1018584aec <a2639a7f0f5bf7d73f337f8f077c19415c62ed2c || 3a273cd0f47dd672d37736e623849374f9ab9ce9 || d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062 || >=6.4.16 <6.5 || >=6.5.3 <6.6 | 7502c1cf303b69f71d085f5ff7251b0e1b0f09df, 66d432e9b45bae7881ffcdb12cd8fd0bf254ef02, 7d568fede8eac91161a60b710aa920abe9b0fb9f, bad65b4b0a96139f023eadc28a33125963208449, a2639a7f0f5bf7d73f337f8f077c19415c62ed2c, 6.5, 6.6 |
| Linux/Linuxgeneric | 6.6 | Not reported |
Published upstream
May 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-43019 records a High severity (CVSS 7.8) vulnerability in Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a091289218202bc09d9b9caa8afcde1018584aec <7502c1cf303b69f71d085f5ff7251b0e1b0f09df || >=a091289218202bc09d9b9caa8afcde1018584aec <66d432e9b45bae7881ffcdb12cd8fd0bf254ef02 || >=a091289218202bc09d9b9caa8afcde1018584aec <7d568fede8eac91161a60b710aa920abe9b0fb9f || >=a091289218202bc09d9b9caa8afcde1018584aec <bad65b4b0a96139f023eadc28a33125963208449 || >=a091289218202bc09d9b9caa8afcde1018584aec <a2639a7f0f5bf7d73f337f8f077c19415c62ed2c || 3a273cd0f47dd672d37736e623849374f9ab9ce9 || d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062 || >=6.4.16 <6.5 || >=6.5.3 <6.6 | 7502c1cf303b69f71d085f5ff7251b0e1b0f09df, 66d432e9b45bae7881ffcdb12cd8fd0bf254ef02, 7d568fede8eac91161a60b710aa920abe9b0fb9f, bad65b4b0a96139f023eadc28a33125963208449, a2639a7f0f5bf7d73f337f8f077c19415c62ed2c, 6.5, 6.6 |
| Linux/Linuxgeneric | 6.6 | Not reported |
Published upstream
May 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.