CVE-2022-49555

Summary

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_qca: Use del_timer_sync() before freeing

While looking at a crash report on a timer list being corrupted, which usually happens when a timer is freed while still active. This is commonly triggered by code calling del_timer() instead of del_timer_sync() just before freeing.

One possible culprit is the hci_qca driver, which does exactly that.

Eric mentioned that wake_retrans_timer could be rearmed via the work queue, so also move the destruction of the work queue before del_timer_sync().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0ff252c1976da5d80db1377eb39b551931e61826 < 4989bb03342941f2b730b37dfa38bce27b543661affected
LinuxLinux0ff252c1976da5d80db1377eb39b551931e61826 < db03727b4bbbbb36e6ef4cb655c670eefb6448e9affected
LinuxLinux0ff252c1976da5d80db1377eb39b551931e61826 < 37d17f63d085d601011964ade7371aeebeb6ed4baffected
LinuxLinux0ff252c1976da5d80db1377eb39b551931e61826 < 2717654ae022e6ea959a4b7b762702fe1a4690c2affected
LinuxLinux0ff252c1976da5d80db1377eb39b551931e61826 < 72ef98445aca568a81c2da050532500a8345ad3aaffected
LinuxLinux4.3affected
LinuxLinux0 < 4.3unaffected
LinuxLinux5.10.120 <= 5.10.*unaffected
LinuxLinux5.15.45 <= 5.15.*unaffected
LinuxLinux5.17.13 <= 5.17.*unaffected
LinuxLinux5.18.2 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

References