CVE-2026-68479
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
In the Linux kernel's Bluetooth btrtl driver, there is a vulnerability due to improper bounds checking of firmware patches. A too-short patch can cause arithmetic underflow and lead to oversized read/write during Bluetooth setup.
Risk Assessment
A local attacker with firmware access could cause memory corruption or system crash.
Recommendation
Apply a kernel patch that validates patch length and range without arithmetic overflow.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btrtl: validate firmware patch bounds rtlbt_parse_firmware() copies patch_length - 4 bytes before appending the firmware version. A malformed firmware patch shorter than the version field can make this subtraction underflow and turn the copy into an oversized read and write during Bluetooth setup. The existing patch_offset + patch_length check can also wrap on 32-bit architectures. Validate the patch length and range without arithmetic overflow before allocating or copying the patch.