Bluetooth: L2CAP: reject accept queue add unless BT_LISTEN
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: reject accept queue add unless BT_LISTEN New sk should not be added to parent socket accept queue after last l2cap_sock_cleanup_listen() has run in l2cap_sock_teardown_cb() and state set to BT_CLOSED, as that can result to UAF on dereferencing the dangling parent reference. l2cap_sock_new_connection_cb() may race with parent l2cap_chan teardown, due to chan->state accessed without consistent locking: [Task 1] [Task 2] l2cap_sock_release(parent) l2cap_connect l2cap_sock_shutdown pchan = l2cap_global_chan_by_psm l2cap_chan_lock(pchan) l2cap_chan_close l2cap_sock_teardown_cb pchan->state = BT_CLOSED l2cap_chan_unlock(pchan) ------> l2cap_chan_lock(pchan) l2cap_new_connection l2cap_sock_new_connection_cb l2cap_chan_lock(pchan) <-------- l2cap_chan_unlock(pchan) l2cap_sock_kill(parent) /* bt_sk(sk)->parent dangling */ Fix by adding check for sk_state == BT_LISTEN after acquiring sk lock in l2cap_sock_new_connection_cb(). Add lock_sock() around sk_state writes where missing, to avoid data races. Although the data races on pchan->state should be fixed too, this defensive sk_state check probably makes sense in any case.
CVE-2026-90092
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-2026-90092
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": "0c17c8832562b2aac288e89cefd0f46074f54bcb",
"lessThan": "bf61a65c6093970e3b50031c4b79ebf3bd411eba",
"versionType": "git"
},
{
"status": "affected",
"version": "5105f3e6b2df619c635b5f6a49fac131a36c7952",
"lessThan": "491e4c60017969b053888029998d2a61f298986a",
"versionType": "git"
},
{
"status": "affected",
"version": "c88c185ae0a1067823661b220aeea613df2c127b",
"lessThan": "2a3a27aaf19bf069720e024ce6fde54e6bf80df9",
"versionType": "git"
},
{
"status": "affected",
"version": "1810e42ff6716f320c7269d5850eca48b07b7427",
"lessThan": "87276dc15b559d32757a43b4415c8445fbae06c4",
"versionType": "git"
},
{
"status": "affected",
"version": "2ff1a41a912de8517b4482e946dd951b7d80edbf",
"lessThan": "c47339e169bf4a0a4cfabb91351471f67744c2bc",
"versionType": "git"
},
{
"status": "affected",
"version": "2ff1a41a912de8517b4482e946dd951b7d80edbf",
"lessThan": "d4bfa78fd67929b62b02013c107973e0c5b7aa9a",
"versionType": "git"
},
{
"status": "affected",
"version": "1b1c0da227bf63479bac9982fc8d12df9aaea0fb",
"versionType": "git"
},
{
"status": "affected",
"version": "85426e97dc72f2088ba6d27e74cd58c3fbd43e31",
"versionType": "git"
},
{
"status": "affected",
"version": "a2dcf1a61d056aef15b63c6eae9441344d624389",
"versionType": "git"
},
{
"status": "affected",
"version": "6.1.175",
"lessThan": "6.1.188",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.140",
"lessThan": "6.6.157",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.88",
"lessThan": "6.12.110",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.30",
"lessThan": "6.18.52",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.258",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.209",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.0.7",
"lessThan": "7.1",
"versionType": "semver"
}
],
"programFiles": [
"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": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/l2cap_sock.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90092
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36504 · Revision 1
- Added to Heist Feed
- Publisher date