Bluetooth: btqcomsmd: destroy RPMsg endpoints before freeing hci_dev
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btqcomsmd: destroy RPMsg endpoints before freeing hci_dev The command and ACL RPMsg endpoints store struct btqcomsmd as their callback private data. The receive callbacks dereference btq->hdev without taking an hci_dev reference. The current teardown order frees the hci_dev before destroying the RPMsg endpoints in both the hci_register_dev() error path and the driver remove path. If WCNSS delivers data in that window, the endpoint callback can run with an already freed hci_dev and pass it to the Bluetooth core. For qcom_smd endpoints, rpmsg_destroy_ept() closes the channel and clears the callback under the channel recv_lock. The receive path holds the same lock while invoking the callback, so destroying the endpoints first both prevents new callbacks and serializes with any callback already running. Destroy the command and ACL endpoints before hci_free_dev(). Keep hci_unregister_dev() first during remove so the HCI core stops issuing operations before the transport endpoints are shut down. In the full registration-error cleanup path, return directly after freeing the hci_dev to avoid falling through to the partial-construction labels and destroying the endpoints twice.
CVE-2026-97908
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-2026-97908
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": "5052de8deff5619a9b7071f00084fd0264b58e17",
"lessThan": "aaa7f676418e1eb2c4ef0d4e4b07812b25e7b404",
"versionType": "git"
},
{
"status": "affected",
"version": "5052de8deff5619a9b7071f00084fd0264b58e17",
"lessThan": "962dcc1d8a52e64428cae07806e7f6b8d3ec6ac0",
"versionType": "git"
},
{
"status": "affected",
"version": "5052de8deff5619a9b7071f00084fd0264b58e17",
"lessThan": "2dcc2240b4e5f6e5dce1736f82666aba40eb3b13",
"versionType": "git"
},
{
"status": "affected",
"version": "5052de8deff5619a9b7071f00084fd0264b58e17",
"lessThan": "2d016208a011558f211ec9687889df8318654730",
"versionType": "git"
},
{
"status": "affected",
"version": "5052de8deff5619a9b7071f00084fd0264b58e17",
"lessThan": "f5a427b16e45210dee656b0860728f3d496dee85",
"versionType": "git"
}
],
"programFiles": [
"drivers/bluetooth/btqcomsmd.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/bluetooth/btqcomsmd.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97908
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48800 · Revision 1
- Added to Heist Feed
- Publisher date