Bluetooth: hci_sync: extend conn_hash lookup critical sections
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: extend conn_hash lookup critical sections Using RCU-protected pointers outside the critical sections without refcount is incorrect and may result to UAF. Extend critical section to cover both hci_conn_hash lookup and use of the returned conn. Add surrounding rcu_read_lock() also when return value is not used, in preparation for RCU lockdep requirement to hci_lookup_le_connect(). This avoids concurrent deletion of the conn before we are done dereferencing it. Also, make sure to hold hdev->lock when accessing hdev->accept_list.
CVE-2026-68393
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-2026-68393
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": "eb8b860e87b296bd1874c79a668081efd00f9754",
"lessThan": "3f98e7f38e1bb761a9964a8851f9c08e9c23b3dd",
"versionType": "git"
},
{
"status": "affected",
"version": "6d0417e4e1cf66fd917f06f0454958362714ef7d",
"lessThan": "83b7e67698d0b93f685875ce82c8d335436834f7",
"versionType": "git"
},
{
"status": "affected",
"version": "6d0417e4e1cf66fd917f06f0454958362714ef7d",
"lessThan": "38326774df6198df0cc2744cc73bf77cb741c538",
"versionType": "git"
},
{
"status": "affected",
"version": "6d0417e4e1cf66fd917f06f0454958362714ef7d",
"lessThan": "d5efd6e4b8b0634af6843178fe1a7dd2b2178a3d",
"versionType": "git"
},
{
"status": "affected",
"version": "94bf6380e936339a700c0b3171a49baf512aa70b",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.28",
"lessThan": "6.12.114",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.14.6",
"lessThan": "6.15",
"versionType": "semver"
}
],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68393
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46467 · Revision 1
- Added to Heist Feed
- Publisher date