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. 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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:20

Updated : 2026-08-17 06:17

NVD link : CVE-2026-68479

Mitre link : CVE-2026-68479

CVE.ORG link : CVE-2026-68479

JSON object : View

Products Affected

No product.

CWE

No CWE.

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A malformed firmware patch shorter than the version field\ncan make this subtraction underflow and turn the copy into an oversized\nread and write during Bluetooth setup.\n\nThe existing patch_offset + patch_length check can also wrap on 32-bit\narchitectures. Validate the patch length and range without arithmetic\noverflow before allocating or copying the patch."}], "lastModified": "2026-08-17T06:17:57.447", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}