Bluetooth: MGMT: free the HCI command when it is cancelled
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.18.52, 7.2.6
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: free the HCI command when it is cancelled mgmt_hci_cmd_sync() queues the pending command with a NULL destroy callback, so it is only freed if send_hci_cmd_sync() runs. A cancelled entry is leaked, as _hci_cmd_sync_cancel_entry() does not release entry->data when there is no destroy callback, and hci_cmd_sync_clear() cancels every pending entry when the controller is unregistered. Nothing else reclaims it either: mgmt_pending_new() does not put the command on hdev->mgmt_pending. The leak also pins the socket reference taken by mgmt_pending_new(), so the mgmt socket is never released. Free the command from a destroy callback. The now-empty done label is replaced by a direct return.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 827af4787e74e8df9e8e0677a69fbb15e0856d2f · fixed in e0cd7b34dc6b5414cac3d4cd376f73d3e9ffbd93; From 827af4787e74e8df9e8e0677a69fbb15e0856d2f · fixed in 481533b03985177ddc805e0bd12fc07e7adf9040; From 827af4787e74e8df9e8e0677a69fbb15e0856d2f · fixed in 414b365ecea6c30357adee6b8a7c5edc03a03575
- Linux Linux
6.13
- KernelLinux
From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6