High 7.8Published May 1, 2026

CVE-2026-43019Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync

Updated under an hour ago (Oct 26, 2026, 11:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from a091289218202bc09d9b9caa8afcde1018584aec before 7502c1cf303b69f71d085f5ff7251b0e1b0f09df; from a091289218202bc09d9b9caa8afcde1018584aec before 66d432e9b45bae7881ffcdb12cd8fd0bf254ef02; from a091289218202bc09d9b9caa8afcde1018584aec before 7d568fede8eac91161a60b710aa920abe9b0fb9f; from a091289218202bc09d9b9caa8afcde1018584aec before bad65b4b0a96139f023eadc28a33125963208449; from a091289218202bc09d9b9caa8afcde1018584aec before a2639a7f0f5bf7d73f337f8f077c19415c62ed2c; 3a273cd0f47dd672d37736e623849374f9ab9ce9; d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062; from 6.4.16 before 6.5; and 1 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 6.6 before 6.12.81; from 6.13 before 6.18.22; from 6.19 before 6.19.12; 6.4.16; 6.5.3; 7.0; 7.0; 7.0; and 3 more ranges	NVD

References

References

https://git.kernel.org/stable/c/7502c1cf303b69f71d085f5ff7251b0e1b0f09df
https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02	patch
https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f	patch
https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449	patch
https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.