CVE-2026-74530
High
Description
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Linux
PublishedAug 15, 2026
First seenAug 15, 2026
How to fix
Update
- Linux Linux117d8bcaf1abc348185e8ab6a4ba9f8f516849a0, ff5625d27415ace5667bf87ebc16c3a0a98db22f, 2d91e6244b69d752503b2d44020d8b0e323dbd38, 56e78b670356caab0b607e8aad4cf819a1909d07, 6.12.114, 6.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 620810ac1f7f1133a9ac403e132b3ad6995ddf39 ≤ v < 117d8bcaf1abc348185e8ab6a4ba9f8f516849a0, 024421cf39923927ab2b5fe895d1d922b9abe67f ≤ v < ff5625d27415ace5667bf87ebc16c3a0a98db22f, 024421cf39923927ab2b5fe895d1d922b9abe67f ≤ v < 2d91e6244b69d752503b2d44020d8b0e323dbd38, 024421cf39923927ab2b5fe895d1d922b9abe67f ≤ v < 56e78b670356caab0b607e8aad4cf819a1909d07, ee0586ad64a805eaf1a9a10100e908627a561e34, 6.12.28 ≤ v < 6.12.114, 6.14.6 ≤ v < 6.15, 6.15 | 117d8bcaf1abc348185e8ab6a4ba9f8f516849a0, ff5625d27415ace5667bf87ebc16c3a0a98db22f, 2d91e6244b69d752503b2d44020d8b0e323dbd38, 56e78b670356caab0b607e8aad4cf819a1909d07, 6.12.114, 6.15 |
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