Bluetooth: hci_sync: Fix advertising data UAFs
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 5.16, 6.1.184, 6.6.154, 6.12.103, 6.18.44, and 1 more
- 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
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix advertising data UAFs hci_find_adv_instance() returns an adv_info pointer that is valid only while hdev->lock is held. The advertising command-sync paths perform instance lookups without that lock and, in some cases, retain the pointer while waiting for a controller response. An advertising termination event can therefore interleave as follows: hci_cmd_sync_work hci_rx_work hci_find_adv_instance() __hci_cmd_sync_status() wait for controller reply hci_dev_lock() hci_remove_adv_instance() kfree(adv) adv->scan_rsp_changed = false KASAN reported: BUG: KASAN: slab-use-after-free in hci_set_ext_scan_rsp_data_sync+0x2e1/0x300 Write of size 1 at addr ffff88810a45d21d by task kworker/u17:0/88 Workqueue: hci0 hci_cmd_sync_work Call Trace: hci_set_ext_scan_rsp_data_sync+0x2e1/0x300 hci_schedule_adv_instance_sync+0x390/0x4c0 hci_cmd_sync_work+0x173/0x300 Allocated by task 87: hci_add_adv_instance+0x538/0xac0 add_advertising+0x885/0x1160 Freed by task 89: kfree+0x131/0x3c0 hci_remove_adv_instance+0x1d8/0x3b0 hci_le_ext_adv_term_evt+0x17b/0x730 Protect the instance lookup and payload construction in the extended advertising, scan response, and periodic advertising data paths. Snapshot the advertising parameters under hdev->lock, but release the lock before waiting for the controller. Clear advertising-data dirty bits before issuing their commands and restore them after a failure using a fresh lookup. Likewise, update the reported transmit power through a fresh lookup after the parameter command completes. No adv_info pointer then survives an HCI command wait.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From cba6b758711cab946c787f7c15be92cc749b8e1f · fixed in 565971488191bf54a87a417abafab6ad0de72201; From cba6b758711cab946c787f7c15be92cc749b8e1f · fixed in c4cec575a6d6f7c36808a3a0017b0675968bb06b; From cba6b758711cab946c787f7c15be92cc749b8e1f · fixed in 95cdcd8c82a501931fd3ae9b3811b0b6da167e94; From cba6b758711cab946c787f7c15be92cc749b8e1f · fixed in eb1d8318764de7216e6dbba29a24d69f7ce51348; From cba6b758711cab946c787f7c15be92cc749b8e1f · fixed in b16ebdbebd2d37f4cdc590bc3e9db71fe90350a3; From cba6b758711cab946c787f7c15be92cc749b8e1f · fixed in cdc36db204ffd97b947d64374cf23a210dc74777; From 5.15.210 · fixed in 5.16
- Linux Linux
5.17
- KernelLinux
From 5.17.0 · fixed in 6.1.184; From 6.2.0 · fixed in 6.6.154; From 6.7.0 · fixed in 6.12.103; From 6.13.0 · fixed in 6.18.44; From 6.19.0 · fixed in 7.1.8