Bluetooth: btusb: Fix UAF of btusb_data by rx_work
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: Fix UAF of btusb_data by rx_work btusb_close() and btusb_flush() cancel data->rx_work with the asynchronous cancel_delayed_work(), so if btusb_rx_work() is already running on another CPU it keeps running after the cancel returns. btusb_disconnect() calls hci_unregister_dev(), which invokes btusb_close(), and then frees the btusb_data. A still running btusb_rx_work() then dereferences the freed data: while ((skb = skb_dequeue(&data->acl_q))) data->recv_acl(data->hdev, skb); Use cancel_delayed_work_sync() instead. In btusb_close() the cancel also has to happen after btusb_stop_traffic(), otherwise an URB completion racing with the cancel can requeue the work right after it has been waited for.
CVE-2026-97977
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-2026-97977
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": "800fe5ec302e1ebbf5e3f891f886deecd49c7132",
"lessThan": "fc654a72a8d979db15e2773a481e931abaf5a9e8",
"versionType": "git"
},
{
"status": "affected",
"version": "800fe5ec302e1ebbf5e3f891f886deecd49c7132",
"lessThan": "5242050195a711e9cd6a9935f689ab6656b94a91",
"versionType": "git"
},
{
"status": "affected",
"version": "800fe5ec302e1ebbf5e3f891f886deecd49c7132",
"lessThan": "472d005622525b7be155cac99dde2252b0163bd1",
"versionType": "git"
},
{
"status": "affected",
"version": "800fe5ec302e1ebbf5e3f891f886deecd49c7132",
"lessThan": "93b59937bda3fffc6386c79f5544a39bc680c8e8",
"versionType": "git"
},
{
"status": "affected",
"version": "800fe5ec302e1ebbf5e3f891f886deecd49c7132",
"lessThan": "fa391adb9c755515a89993634745e9079e5ef37c",
"versionType": "git"
},
{
"status": "affected",
"version": "800fe5ec302e1ebbf5e3f891f886deecd49c7132",
"lessThan": "1c12c3117639e78940959d956519c758c57d0849",
"versionType": "git"
}
],
"programFiles": [
"drivers/bluetooth/btusb.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"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/btusb.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97977
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38112 · Revision 1
- Added to Heist Feed
- Publisher date