High 8.8Published Aug 15, 2026

CVE-2026-74530Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback

Updated under an hour ago (Oct 27, 2026, 2:23 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_sync: hold conn in hci_connect_big_sync() callback There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that. Handle NULL hcon, return 0 + do nothing to match the previous behavior.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
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: Received
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	620810ac1f7f1133a9ac403e132b3ad6995ddf39 builds before 117d8bcaf1abc348185e8ab6a4ba9f8f516849a0; from 024421cf39923927ab2b5fe895d1d922b9abe67f before ff5625d27415ace5667bf87ebc16c3a0a98db22f; 024421cf39923927ab2b5fe895d1d922b9abe67f builds before 2d91e6244b69d752503b2d44020d8b0e323dbd38; 024421cf39923927ab2b5fe895d1d922b9abe67f builds before 56e78b670356caab0b607e8aad4cf819a1909d07; ee0586ad64a805eaf1a9a10100e908627a561e34; from 6.12.28 before 6.12.114; from 6.14.6 before 6.15	CNA record

References

References

https://git.kernel.org/stable/c/117d8bcaf1abc348185e8ab6a4ba9f8f516849a0
https://git.kernel.org/stable/c/ff5625d27415ace5667bf87ebc16c3a0a98db22f
https://git.kernel.org/stable/c/2d91e6244b69d752503b2d44020d8b0e323dbd38
https://git.kernel.org/stable/c/56e78b670356caab0b607e8aad4cf819a1909d07

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.