CVE-2026-68479

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxdb33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 39e01b4addfbbe177567d6ed1dfb81f9cccb19e6affected
LinuxLinuxdb33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < bda3c598ade6ea03884074b91e31608326684921affected
LinuxLinuxdb33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < a4cb830e0b55ac76c849fd7840afb251f4c028faaffected
LinuxLinuxdb33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 68c5a2a19987c035eb129e627e579adafb04f637affected
LinuxLinuxdb33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 83534891c058ed71e251135072640911670869aaaffected
LinuxLinuxdb33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 6744ab60dfac55d1df5733960aad5be300984301affected
LinuxLinuxdb33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < f1ca750c0510bdbb504bf084d2f196ef2af92ea6affected
LinuxLinuxdb33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 609c5b04a28dc1b0f3af6a7bc93055135b2d2059affected
LinuxLinux4.2affected
LinuxLinux0 < 4.2unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2-rc4 <= *unaffected

Weaknesses

References