Bluetooth: fix UAF in bt_accept_dequeue()
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix UAF in bt_accept_dequeue() bt_accept_get() takes a temporary reference before dropping the accept queue lock. bt_accept_dequeue() currently drops that reference before bt_accept_unlink(), leaving only the queue reference. bt_accept_unlink() drops the queue reference. The subsequent sock_hold() therefore accesses freed memory if it was the final reference, as observed by KASAN during listening L2CAP socket cleanup. Retain the temporary queue-walk reference through unlink and hand it to the caller on success. Drop it explicitly on the closed and not-yet-connected paths.
CVE-2026-64406
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-2026-64406
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": "751de6ec671fe75ad9cf65a0638d2a06b6a5984d",
"lessThan": "c0577c55219be42b6ea2ea8db11e85bfab6f4e8d",
"versionType": "git"
},
{
"status": "affected",
"version": "407217734835d21d4e0105ebf347860dc1806f88",
"lessThan": "96ad400d5132eb333f28f6f1e2d58f0728ca9547",
"versionType": "git"
},
{
"status": "affected",
"version": "7eebd4c2c86f573af87ff165d08a83432eb0b919",
"lessThan": "0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0",
"versionType": "git"
},
{
"status": "affected",
"version": "5d86d2f1b4d9a508c441d3e45277ae1a73cfed57",
"lessThan": "c66a95e60b65d876a927123b0ed36bd6177d9ca6",
"versionType": "git"
},
{
"status": "affected",
"version": "87c543e2f78d0871f271df92dab98901bbd5b6f5",
"lessThan": "6303ed4bbe0095f4cc195225479bf506e010d1db",
"versionType": "git"
},
{
"status": "affected",
"version": "added1213395071470a900cc845a042fb51882a6",
"lessThan": "26168db1ce5a9766cde021b18e590a101c056614",
"versionType": "git"
},
{
"status": "affected",
"version": "ab1513597c6cf17cd1ad2a21e3b045421b48e022",
"lessThan": "50c662bdcd51b03033a0abed6716bfd377ba1049",
"versionType": "git"
},
{
"status": "affected",
"version": "ab1513597c6cf17cd1ad2a21e3b045421b48e022",
"lessThan": "4bd0b274054f2679f28b70222b607bb0afc3ab9a",
"versionType": "git"
},
{
"status": "affected",
"version": "a5ca86a6097a8b030ca3226cd300b17ed330f966",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.259",
"lessThan": "5.10.261",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.210",
"lessThan": "5.15.212",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.175",
"lessThan": "6.1.178",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.142",
"lessThan": "6.6.145",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.92",
"lessThan": "6.12.96",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.34",
"lessThan": "6.18.39",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.0.11",
"lessThan": "7.1",
"versionType": "semver"
}
],
"programFiles": [
"net/bluetooth/af_bluetooth.c",
"net/bluetooth/l2cap_sock.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.1",
"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": "6.12.96",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/af_bluetooth.c",
"net/bluetooth/l2cap_sock.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64406
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41031 · Revision 1
- Added to Heist Feed
- Publisher date