Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt hci_le_create_big_complete_evt() iterates over BT_BOUND connections for a BIG handle using a while loop, accessing ev->bis_handle[i++] on each iteration. However, there is no check that i stays within ev->num_bis before the array access. When a controller sends a LE_Create_BIG_Complete event with fewer bis_handle entries than there are BT_BOUND connections for that BIG, or with num_bis=0, the loop reads beyond the valid bis_handle[] flex array into adjacent heap memory. Since the out-of-bounds values typically exceed HCI_CONN_HANDLE_MAX (0x0EFF), hci_conn_set_handle() rejects them and the connection remains in BT_BOUND state. The same connection is then found again by hci_conn_hash_lookup_big_state(), creating an infinite loop with hci_dev_lock held. Fix this by terminating the BIG if in case not all BIS could be setup properly.
CVE-2026-46138
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-2026-46138
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": "a0bfde167b506423111ddb8cd71930497a40fc54",
"lessThan": "6cb7f67bc28da787499291a562d49a084d9c90cd",
"versionType": "git"
},
{
"status": "affected",
"version": "a0bfde167b506423111ddb8cd71930497a40fc54",
"lessThan": "22559ad7654f61727fc270ee4893da9f4b70cf17",
"versionType": "git"
},
{
"status": "affected",
"version": "a0bfde167b506423111ddb8cd71930497a40fc54",
"lessThan": "77981a507aa0fc001dc37f0dd6631dd2042fed17",
"versionType": "git"
},
{
"status": "affected",
"version": "a0bfde167b506423111ddb8cd71930497a40fc54",
"lessThan": "665da0baaf0396f9ed3c86ccb3955dcd0b73e774",
"versionType": "git"
},
{
"status": "affected",
"version": "a0bfde167b506423111ddb8cd71930497a40fc54",
"lessThan": "5ddb8014261137cadaf83ab5617a588d80a22586",
"versionType": "git"
},
{
"status": "affected",
"version": "b475c1109251e30ec21fb574d72a1c71a4ab0039",
"versionType": "git"
},
{
"status": "affected",
"version": "2ccde10127447c1a5caad8469fede945bdb62fdf",
"versionType": "git"
},
{
"status": "affected",
"version": "6.4.16",
"lessThan": "6.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.5.3",
"lessThan": "6.6",
"versionType": "semver"
}
],
"programFiles": [
"net/bluetooth/hci_event.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.88",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.30",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_event.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46138
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40141 · Revision 1
- Added to Heist Feed
- Publisher date