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CVE-2025-71073

7.8 high Modified
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: Input: lkkbd - disable pending work before freeing device lkkbd_interrupt() schedules lk->tq via schedule_work(), and the work handler lkkbd_reinit() dereferences the lkkbd structure and its serio/input_dev fields. lkkbd_disconnect() and error paths in lkkbd_connect() free the lkkbd structure without preventing the reinit work from being queued again until serio_close() returns. This can allow the work handler to run after the structure has been freed, leading to a potential use-after-free. Use disable_work_sync() instead of cancel_work_sync() to ensure the reinit work cannot be re-queued, and call it both in lkkbd_disconnect() and in lkkbd_connect() error paths after serio_open().

Fix

Patch, vendor advisory and mitigation references on NVD 3

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 5

  1. CwesCWE-416NVD modified 2026-10-21 13:18
  2. Cpes+14 CPE criteria (now 14)NVD modified 2026-10-21 13:18
  3. StatusPublished → ModifiedNVD modified 2026-10-21 13:18
  4. CVSS7.8 (v3.1, CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)NVD modified 2026-10-21 13:18
  5. First seenunscored · linuxNVD modified 2026-10-21 12:38

Affected (CPE criteria) 14

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*

References 4