Bluetooth: mgmt: fix race in read_unconf_index_list()
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: mgmt: fix race in read_unconf_index_list() read_unconf_index_list() counts unconfigured controllers before allocating its response, then checks the device flags again while filling it. hci_dev_list_lock stabilizes list membership, but it does not serialize the per-device flags. During asynchronous controller setup, the worker can set HCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller omitted from the allocation count can then become eligible for the fill pass, causing an out-of-bounds write to rp->index[]. Allocate space for every device on hci_dev_list. Since list membership cannot change while hci_dev_list_lock is held, the response remains large enough regardless of flag transitions. The reported count and response length still include only eligible unconfigured controllers.
CVE-2026-98456
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-2026-98456
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": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
"lessThan": "524e0450dd9a396f99a81b045219b0e2ea0dab57",
"versionType": "git"
},
{
"status": "affected",
"version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
"lessThan": "8ddf962c76432a10a6cb80042875cbc48a9c056b",
"versionType": "git"
},
{
"status": "affected",
"version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
"lessThan": "416546cd6a54e9b68f2b91bc680b1ee17dcd77a1",
"versionType": "git"
},
{
"status": "affected",
"version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
"lessThan": "2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1",
"versionType": "git"
},
{
"status": "affected",
"version": "73d1df2a7a1036a1f000e5f0ece6ade3e082b854",
"lessThan": "b5dbb41b212c50c095a4dbee3017a84fe94f033b",
"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": "3.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/mgmt.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98456
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #55595 · Revision 1
- Added to Heist Feed
- Publisher date