CVE-2026-89899

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux490d84f6d73c12f4204241cff8651eed60aae914 < 9a951931d4b4084acd64fa55fc3672a9da45ddf9affected
LinuxLinux490d84f6d73c12f4204241cff8651eed60aae914 < a3adb63b121937b97f7fdc51e96564c7c799538baffected
LinuxLinux490d84f6d73c12f4204241cff8651eed60aae914 < 9c6ceb0949227c1f0cf0e19393daec72d9889871affected
LinuxLinux490d84f6d73c12f4204241cff8651eed60aae914 < 0fbd5c2327020858c45b2d1c65775d64cdeca523affected
LinuxLinuxe448dfd6d3ec944411f6575bc24e4f8baa1e297faffected
LinuxLinux2781b86d7e45de09befa5ace296b66787146561faffected
LinuxLinux4.18.19 < 4.19affected
LinuxLinux4.19.2 < 4.20affected
LinuxLinux4.20affected
LinuxLinux0 < 4.20unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References