Bluetooth: MGMT: validate advertising TLV before type checks
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate advertising TLV before type checks tlv_data_is_valid() reads each advertising data field length from data[i], then inspects data[i + 1] for managed EIR types before checking that the current field still fits inside the supplied buffer. A malformed field whose length byte is the last byte of the buffer can therefore make the parser read one byte past the advertising data. KASAN reported the following when a malformed MGMT_OP_ADD_ADVERTISING request reached that path: BUG: KASAN: vmalloc-out-of-bounds in tlv_data_is_valid() Read of size 1 Call trace: tlv_data_is_valid() add_advertising() hci_mgmt_cmd() hci_sock_sendmsg() Move the existing element-length check before any type-octet inspection so each non-empty element is proven to contain its type byte before the parser looks at data[i + 1].
CVE-2026-53255
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-2026-53255
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": "2bb36870e8cb29949ef9acec37129cd8e70f1857",
"lessThan": "13ad995071a06570668dd8daab3616c247c72080",
"versionType": "git"
},
{
"status": "affected",
"version": "2bb36870e8cb29949ef9acec37129cd8e70f1857",
"lessThan": "06fcbd79c3c360a50f9be9d370769bbd738d0976",
"versionType": "git"
},
{
"status": "affected",
"version": "2bb36870e8cb29949ef9acec37129cd8e70f1857",
"lessThan": "f7093ac233c1e7f51d125534f46067772a113175",
"versionType": "git"
},
{
"status": "affected",
"version": "2bb36870e8cb29949ef9acec37129cd8e70f1857",
"lessThan": "74c08e4db35a476c3462aeb65846f955be732626",
"versionType": "git"
},
{
"status": "affected",
"version": "2bb36870e8cb29949ef9acec37129cd8e70f1857",
"lessThan": "18fea1cb0c2599752e908c8217490f73ddd33e00",
"versionType": "git"
},
{
"status": "affected",
"version": "2bb36870e8cb29949ef9acec37129cd8e70f1857",
"lessThan": "1a3c8ffbb469859b076445af44bdfa6a711d483e",
"versionType": "git"
},
{
"status": "affected",
"version": "2bb36870e8cb29949ef9acec37129cd8e70f1857",
"lessThan": "2a3f3ed9e198ae23c15859ace2f9ca6cfdc35b57",
"versionType": "git"
},
{
"status": "affected",
"version": "2bb36870e8cb29949ef9acec37129cd8e70f1857",
"lessThan": "de23fb62259aa01d294f77238ae3b835eb674413",
"versionType": "git"
}
],
"programFiles": [
"net/bluetooth/mgmt.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.94",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.36",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.13",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/mgmt.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53255
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #28444 · Revision 1
- Added to Heist Feed
- Publisher date