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Bluetooth: btrtl: validate firmware patch bounds

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

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
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