CVE-2025-71073 (GCVE-0-2025-71073)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:31 – Updated: 2026-01-13 15:31
VLAI?
Title
Input: lkkbd - disable pending work before freeing device
Summary
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().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3a7cd1397c209076c371d53bf39a55c138f62342 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cffc4e29b1e2d44ab094cf142d7c461ff09b9104 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e58c88f0cb2d8ed89de78f6f17409d29cfab6c5c (git)
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    Linux Linux Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc2 , ≤ * (original_commit_for_fix)
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          "programFiles": [
            "drivers/input/keyboard/lkkbd.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: lkkbd - disable pending work before freeing device\n\nlkkbd_interrupt() schedules lk-\u003etq via schedule_work(), and the work\nhandler lkkbd_reinit() dereferences the lkkbd structure and its\nserio/input_dev fields.\n\nlkkbd_disconnect() and error paths in lkkbd_connect() free the lkkbd\nstructure without preventing the reinit work from being queued again\nuntil serio_close() returns. This can allow the work handler to run\nafter the structure has been freed, leading to a potential use-after-free.\n\nUse disable_work_sync() instead of cancel_work_sync() to ensure the\nreinit work cannot be re-queued, and call it both in lkkbd_disconnect()\nand in lkkbd_connect() error paths after serio_open()."
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        "dateUpdated": "2026-01-13T15:31:26.771Z",
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    "cveId": "CVE-2025-71073",
    "datePublished": "2026-01-13T15:31:26.771Z",
    "dateReserved": "2026-01-13T15:30:19.647Z",
    "dateUpdated": "2026-01-13T15:31:26.771Z",
    "state": "PUBLISHED"
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}


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