High 7.8Published Aug 15, 2026

CVE-2026-68479Bluetooth: btrtl: validate firmware patch bounds

Updated under an hour ago (Oct 28, 2026, 7:50 AM ET)

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Exploited in the last 30 days

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: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-190
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 before 39e01b4addfbbe177567d6ed1dfb81f9cccb19e6; from db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 before bda3c598ade6ea03884074b91e31608326684921; from db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 before a4cb830e0b55ac76c849fd7840afb251f4c028fa; from db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 before 68c5a2a19987c035eb129e627e579adafb04f637; from db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 before 83534891c058ed71e251135072640911670869aa; from db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 before 6744ab60dfac55d1df5733960aad5be300984301; from db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 before f1ca750c0510bdbb504bf084d2f196ef2af92ea6; from db33c77dddc2ed2cff3061d0b096a9f5ab0c3647 before 609c5b04a28dc1b0f3af6a7bc93055135b2d2059	CNA record

References

References

https://git.kernel.org/stable/c/39e01b4addfbbe177567d6ed1dfb81f9cccb19e6
https://git.kernel.org/stable/c/bda3c598ade6ea03884074b91e31608326684921
https://git.kernel.org/stable/c/a4cb830e0b55ac76c849fd7840afb251f4c028fa
https://git.kernel.org/stable/c/68c5a2a19987c035eb129e627e579adafb04f637
https://git.kernel.org/stable/c/83534891c058ed71e251135072640911670869aa
https://git.kernel.org/stable/c/6744ab60dfac55d1df5733960aad5be300984301
https://git.kernel.org/stable/c/f1ca750c0510bdbb504bf084d2f196ef2af92ea6
https://git.kernel.org/stable/c/609c5b04a28dc1b0f3af6a7bc93055135b2d2059

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.