What’s Vulnerable › Vulnerabilities

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

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-10-19

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.

Affected products

• Linux kernel: 6.4 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

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

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