Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback
CVE-2026-74530 · published 15 Aug 2026
How serious is it
- Severity: high, CVSS score 8.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-74530?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 620810ac1f7f1133a9ac403e132b3ad6995ddf39 to < 117d8bcaf1abc348185e8ab6a4ba9f8f516849a0, 024421cf39923927ab2b5fe895d1d922b9abe67f to < ff5625d27415ace5667bf87ebc16c3a0a98db22f, 024421cf39923927ab2b5fe895d1d922b9abe67f to < 2d91e6244b69d752503b2d44020d8b0e323dbd38, 024421cf39923927ab2b5fe895d1d922b9abe67f to < 56e78b670356caab0b607e8aad4cf819a1909d07
- Linux Linux: 6.15
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/117d8bcaf1abc348185e8ab6a4ba9f8f516849a0
- git.kernel.org/stable/c/ff5625d27415ace5667bf87ebc16c3a0a98db22f
- git.kernel.org/stable/c/2d91e6244b69d752503b2d44020d8b0e323dbd38
- git.kernel.org/stable/c/56e78b670356caab0b607e8aad4cf819a1909d07
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON