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.
CVE-2026-68479
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-68479
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "db33c77dddc2ed2cff3061d0b096a9f5ab0c3647",
"lessThan": "39e01b4addfbbe177567d6ed1dfb81f9cccb19e6",
"versionType": "git"
},
{
"status": "affected",
"version": "db33c77dddc2ed2cff3061d0b096a9f5ab0c3647",
"lessThan": "bda3c598ade6ea03884074b91e31608326684921",
"versionType": "git"
},
{
"status": "affected",
"version": "db33c77dddc2ed2cff3061d0b096a9f5ab0c3647",
"lessThan": "a4cb830e0b55ac76c849fd7840afb251f4c028fa",
"versionType": "git"
},
{
"status": "affected",
"version": "db33c77dddc2ed2cff3061d0b096a9f5ab0c3647",
"lessThan": "68c5a2a19987c035eb129e627e579adafb04f637",
"versionType": "git"
},
{
"status": "affected",
"version": "db33c77dddc2ed2cff3061d0b096a9f5ab0c3647",
"lessThan": "83534891c058ed71e251135072640911670869aa",
"versionType": "git"
},
{
"status": "affected",
"version": "db33c77dddc2ed2cff3061d0b096a9f5ab0c3647",
"lessThan": "6744ab60dfac55d1df5733960aad5be300984301",
"versionType": "git"
},
{
"status": "affected",
"version": "db33c77dddc2ed2cff3061d0b096a9f5ab0c3647",
"lessThan": "f1ca750c0510bdbb504bf084d2f196ef2af92ea6",
"versionType": "git"
},
{
"status": "affected",
"version": "db33c77dddc2ed2cff3061d0b096a9f5ab0c3647",
"lessThan": "609c5b04a28dc1b0f3af6a7bc93055135b2d2059",
"versionType": "git"
}
],
"programFiles": [
"drivers/bluetooth/btrtl.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/bluetooth/btrtl.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68479
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41735 · Revision 1
- Added to Heist Feed
- Publisher date