CVE-2026-89899: Linux

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Linux Linux: from 4.18.19, before 4.19 (fixed in 4.19); from 4.19.2, before 4.20 (fixed in 4.20); from 4.20, before 6.12.110 (fixed in 6.12.110); from 6.13, before 6.18.51 (fixed in 6.18.51); from 6.19, before 7.2.5 (fixed in 7.2.5)

Published 2026-09-16. Last modified 2026-09-16.