Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: media: cec: disable delayed work before freeing an interrupted transmit cec_transmit_msg_fh() drops adap->lock to wait for a blocking transmit in wait_for_completion_killable(). If that wait is interrupted by a signal, cancel_delayed_work_sync() can run before the CEC kthread arms the reply timeout via schedule_delayed_work(&data->work) in cec_transmit_done_ts(). The work is then armed after the cancel, and the data is freed with its delayed_work still pending: ODEBUG: free active (active state 0) object: ... hint: cec_wait_timeout Use disable_delayed_work_sync(): it cancels the work and disables it, so the later schedule_delayed_work() becomes a no-op and the work cannot be re-armed. The data is freed right after, so it need not be re-enabled.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 490d84f6d73c12f4204241cff8651eed60aae914 before 9a951931d4b4084acd64fa55fc3672a9da45ddf9; affected 490d84f6d73c12f4204241cff8651eed60aae914 before a3adb63b121937b97f7fdc51e96564c7c799538b; affected 490d84f6d73c12f4204241cff8651eed60aae914 before 9c6ceb0949227c1f0cf0e19393daec72d9889871; affected 490d84f6d73c12f4204241cff8651eed60aae914 before 0fbd5c2327020858c45b2d1c65775d64cdeca523; affected e448dfd6d3ec944411f6575bc24e4f8baa1e297f; affected 2781b86d7e45de09befa5ace296b66787146561f; affected 4.18.19 before 4.19; affected 4.19.2 before 4.20 |
| Linux / Linux | affected 4.20; unaffected 0 before 4.20; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.