{"id":"CVE-2026-98645","summary":"HID: winwing: fix use-after-free in force feedback teardown","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: winwing: fix use-after-free in force feedback teardown\n\nwinwing_init_ff() passes the driver's private data, allocated with\ndevm_kzalloc() in winwing_probe(), as the effect context to\ninput_ff_create_memless(). The memoryless force-feedback core takes\nownership of that pointer and frees it with kfree() from\ninput_ff_destroy() (ml_ff_destroy()) when the input device is\ndestroyed.\n\nFreeing a devm-managed allocation with kfree() is an invalid free, and\nthe same object is then released again by devres when the HID device is\ntorn down, a double free. As the allocation also embeds the LED class\ndevices, their timers and work item live on freed memory and the slab\ngets corrupted. This triggers on unbind, rmmod, hot-unplug and on system\nsuspend, where the firmware cache walks the now-corrupt devres list.\nKASAN reports:\n\n  BUG: KASAN: invalid-free in input_ff_destroy\n  Allocated by task N:\n    winwing_probe\n\nPass NULL as the memless context instead and fetch the driver data from\nthe input device in winwing_play_effect(): the HID core already stores\nthe hid_device as the input device's drvdata. The force-feedback core\nthen owns nothing that it must not free.","modified":"2026-10-20T02:30:39.577620364Z","published":"2026-10-18T15:20:16.676Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98645.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2b25f11ec52ea0a82334d5b83ee321f6b0a35923"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1a5ad37e50ceb192c07ac7e2d7143638cd4d110"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98645.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98645"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"42d020b54edc57d03749bed75976f1e962a9fbfa"},{"fixed":"2b25f11ec52ea0a82334d5b83ee321f6b0a35923"},{"fixed":"a1a5ad37e50ceb192c07ac7e2d7143638cd4d110"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98645.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.1.0"},{"fixed":"7.2.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98645.json"}}],"schema_version":"1.9.0"}