What is CVE-2026-43019?

CVE-2026-43019 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-01.

How severe is CVE-2026-43019?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Linux

CVE-2026-43019

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 possib…

Vulnerability class: Use-After-Free

EPSS: 0.000 (3.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 7.0, 6.5.3, d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062
Linux Linux_kernel — versions 6.4.16, 6.5.3, 7.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-43019?: CVE-2026-43019 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-01.
How severe is CVE-2026-43019?: High severity. CVSS v3 base score is 7.8 out of 10.