CVE-2026-68479
Bluetooth: btrtl: validate firmware patch bounds
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 15, 2026 |
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Affected Versions
Linux / Linux
db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 39e01b4addfbbe177567d6ed1dfb81f9cccb19e6 db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < bda3c598ade6ea03884074b91e31608326684921 db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < a4cb830e0b55ac76c849fd7840afb251f4c028fa db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 68c5a2a19987c035eb129e627e579adafb04f637 db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 83534891c058ed71e251135072640911670869aa db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 6744ab60dfac55d1df5733960aad5be300984301 db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < f1ca750c0510bdbb504bf084d2f196ef2af92ea6 db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 < 609c5b04a28dc1b0f3af6a7bc93055135b2d2059
Linux / Linux
4.2
References
git.kernel.org: https://git.kernel.org/stable/c/39e01b4addfbbe177567d6ed1dfb81f9cccb19e6 git.kernel.org: https://git.kernel.org/stable/c/bda3c598ade6ea03884074b91e31608326684921 git.kernel.org: https://git.kernel.org/stable/c/a4cb830e0b55ac76c849fd7840afb251f4c028fa git.kernel.org: https://git.kernel.org/stable/c/68c5a2a19987c035eb129e627e579adafb04f637 git.kernel.org: https://git.kernel.org/stable/c/83534891c058ed71e251135072640911670869aa git.kernel.org: https://git.kernel.org/stable/c/6744ab60dfac55d1df5733960aad5be300984301 git.kernel.org: https://git.kernel.org/stable/c/f1ca750c0510bdbb504bf084d2f196ef2af92ea6 git.kernel.org: https://git.kernel.org/stable/c/609c5b04a28dc1b0f3af6a7bc93055135b2d2059