Bluetooth: ISO: lock sk in iso_connect_ind
CVE-2026-74538 · 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-2026-74538?
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: 168d9bf9c7f01df71e6404cfff66d9c2a8e968fb to < 0e830354c120954ccb9ca15880245912722c4031, 168d9bf9c7f01df71e6404cfff66d9c2a8e968fb to < e8e9cff6d80eeec28dec4cf7cc18662986945391, 168d9bf9c7f01df71e6404cfff66d9c2a8e968fb to < 9bee7e476534f27e830658dad962d85da9edf6bf, 168d9bf9c7f01df71e6404cfff66d9c2a8e968fb to < 4311fd6f429065a8ba208660360a895627a00cf3
- Linux Linux: 6.9
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: ISO: lock sk in iso_connect_ind
Accessing iso_pi(sk)->conn requires lock_sock, which is not taken in the
"ev3" part of iso_connect_ind. It may also be NULL if socket has
transitioned away from the LISTEN/CONNECT states before locking.
Fix by adding lock/release. Recheck hcon is valid after lock acquire
where needed.
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/0e830354c120954ccb9ca15880245912722c4031
- git.kernel.org/stable/c/e8e9cff6d80eeec28dec4cf7cc18662986945391
- git.kernel.org/stable/c/9bee7e476534f27e830658dad962d85da9edf6bf
- git.kernel.org/stable/c/4311fd6f429065a8ba208660360a895627a00cf3
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON