Bluetooth: btrtl: validate firmware patch bounds
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.261, 5.15.212, 6.1.178, 6.12.97, 6.18.40, 6.6.145, 7.1.5
- CVEs
- CVE-2026-68479
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 00:31 UTC · Revision 1
Source evidence
Bluetooth: btrtl: validate firmware patch bounds
core-osv · Original sourcePublished 15 Aug 2026, 05:51 UTC
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.
osv:CVE-2026-68479
Kernel
Fixed versions: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5
Complete source record
{
"id": "c13c53ba6da3291c516bf59dc0774a0c3b9602e9ec331d892d62bf7e5734e931",
"url": "https://osv.dev/vulnerability/CVE-2026-68479",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Bluetooth: btrtl: validate firmware patch bounds",
"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.",
"evidence": "osv:CVE-2026-68479",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.10.261",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.212",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.178",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.145",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.97",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.40",
"evidence": "/affected/1/ranges"
},
{
"value": "7.1.5",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "CVE-2026-68479",
"aliases": [
"CVE-2026-68479"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "db33c77dddc2ed2cff3061d0b096a9f5ab0c3647"
},
{
"fixed": "39e01b4addfbbe177567d6ed1dfb81f9cccb19e6"
},
{
"fixed": "bda3c598ade6ea03884074b91e31608326684921"
},
{
"fixed": "a4cb830e0b55ac76c849fd7840afb251f4c028fa"
},
{
"fixed": "68c5a2a19987c035eb129e627e579adafb04f637"
},
{
"fixed": "83534891c058ed71e251135072640911670869aa"
},
{
"fixed": "6744ab60dfac55d1df5733960aad5be300984301"
},
{
"fixed": "f1ca750c0510bdbb504bf084d2f196ef2af92ea6"
},
{
"fixed": "609c5b04a28dc1b0f3af6a7bc93055135b2d2059"
}
]
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68479.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.2.0"
},
{
"fixed": "5.10.261"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.11.0"
},
{
"fixed": "5.15.212"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.16.0"
},
{
"fixed": "6.1.178"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
},
{
"fixed": "6.6.145"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
},
{
"fixed": "6.12.97"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
},
{
"fixed": "6.18.40"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.1.5"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68479.json"
}
}
],
"modified": "2026-10-28T02:30:52.166854258Z",
"provider": "osv",
"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",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68479.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-68479",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68479.json"
}
},
"related_cves": [
{
"value": "CVE-2026-68479",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 520989,
"published_at": "2026-08-15T05:51:34.106+00:00"
}