{"id":"CVE-2026-98645","title":"HID: winwing: fix use-after-free in force feedback teardown","summary":"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 th…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 42d020b54edc57d03749bed75976f1e962a9fbfa < 2b25f11ec52ea0a82334d5b83ee321f6b0a35923","Linux >= 42d020b54edc57d03749bed75976f1e962a9fbfa < a1a5ad37e50ceb192c07ac7e2d7143638cd4d110","Linux 7.1"],"published":"2026-10-18","updated":"2026-10-19","sourceUpdated":"2026-10-19T09:23:14.926Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98645","references":[{"url":"https://git.kernel.org/stable/c/2b25f11ec52ea0a82334d5b83ee321f6b0a35923"},{"url":"https://git.kernel.org/stable/c/a1a5ad37e50ceb192c07ac7e2d7143638cd4d110"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.228Z","slug":"CVE-2026-98645","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 42d020b54edc57d03749bed75976f1e962a9fbfa < 2b25f11ec52ea0a82334d5b83ee321f6b0a35923`\n- `Linux >= 42d020b54edc57d03749bed75976f1e962a9fbfa < a1a5ad37e50ceb192c07ac7e2d7143638cd4d110`\n- `Linux 7.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}