CVE-2026-68479
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.17% probability · 6th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/39e01b4addfbbe177567d6ed1dfb81f9cccb19e6
- https://git.kernel.org/stable/c/609c5b04a28dc1b0f3af6a7bc93055135b2d2059
- https://git.kernel.org/stable/c/6744ab60dfac55d1df5733960aad5be300984301
- https://git.kernel.org/stable/c/68c5a2a19987c035eb129e627e579adafb04f637
- https://git.kernel.org/stable/c/83534891c058ed71e251135072640911670869aa
- https://git.kernel.org/stable/c/a4cb830e0b55ac76c849fd7840afb251f4c028fa
- https://git.kernel.org/stable/c/bda3c598ade6ea03884074b91e31608326684921
- https://git.kernel.org/stable/c/f1ca750c0510bdbb504bf084d2f196ef2af92ea6
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.