{"id":"CVE-2026-80782","title":"HID: magicmouse: do not keep a stale msc->input if no input is claimed","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: magicmouse: do not keep a stale msc->input if no input is claimed\n\nmagicmouse_input_mapping() caches the first hid_input's input_dev in\nmsc->input while the report…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < c3597923932bb90d4fc2186aef552f6677175e4a","Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < e0c224c93d10ee38854fdf24c815108aedd3dcb3","Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14","Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 3d7a7bac4c75f25b2513505a0ac5ba909588ed2b","Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 9bdf8c7bfd79f1090e61d28f969b32880fd77bb3","Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 15b60ade825c8ce9ec560048a4ae3747e4572be3","Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 0bf253e9ac994cb5329bc87b00bb4eeca9136791","Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 2ef16934e069d5f771e989d6ee5c3ece5042f3cd","Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 0af3b89705688af01aa06025b84fa7a1e06ba6cc","Linux 0e55072e7c63a6569cab1447e9025d160abd9dd9","Linux >= 3.8.7 < 3.9","Linux 3.9"],"published":"2026-09-04","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:43:37.541Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80782","references":[{"url":"https://git.kernel.org/stable/c/c3597923932bb90d4fc2186aef552f6677175e4a"},{"url":"https://git.kernel.org/stable/c/e0c224c93d10ee38854fdf24c815108aedd3dcb3"},{"url":"https://git.kernel.org/stable/c/403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14"},{"url":"https://git.kernel.org/stable/c/3d7a7bac4c75f25b2513505a0ac5ba909588ed2b"},{"url":"https://git.kernel.org/stable/c/9bdf8c7bfd79f1090e61d28f969b32880fd77bb3"},{"url":"https://git.kernel.org/stable/c/15b60ade825c8ce9ec560048a4ae3747e4572be3"},{"url":"https://git.kernel.org/stable/c/0bf253e9ac994cb5329bc87b00bb4eeca9136791"},{"url":"https://git.kernel.org/stable/c/2ef16934e069d5f771e989d6ee5c3ece5042f3cd"},{"url":"https://git.kernel.org/stable/c/0af3b89705688af01aa06025b84fa7a1e06ba6cc"}],"tags":["cve.org"],"epss":0.00195,"epssPercentile":0.08586,"ingestedAt":"2026-10-19T10:20:54.956Z","slug":"CVE-2026-80782","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nHID: magicmouse: do not keep a stale msc->input if no input is claimed\n\nmagicmouse_input_mapping() caches the first hid_input's input_dev in\nmsc->input while the report descriptor is parsed, and the rest of the\ndriver treats a non-NULL msc->input as proof that an input device was\nregistered.\n\nThat does not hold on the hid-input error path. If hidinput_connect()\nfails -- for instance because input_register_device() returns an error --\nit unwinds through hidinput_disconnect(), which frees every input_dev it\ncreated, including the one cached in msc->input.\n\nThe failure does not abort the probe. hid_connect() only skips the claim:\n\n\tif ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev,\n\t\t\t\tconnect_mask & HID_CONNECT_HIDINPUT_FORCE))\n\t\thdev->claimed |= HID_CLAIMED_INPUT;\n\nand the \"device has no listeners\" bailout below it does not fire for this\ndriver, which sets ->raw_event; on the USB Magic Mouse 2 / Magic Trackpad\n2 paths hidraw and hiddev are claimed as well. hid_hw_start() therefore\nreturns 0 and magicmouse_probe() continues with msc->input pointing at\nfreed memory. Being non-NULL, it passes the \"input not registered\" check\nin probe and the NULL checks in ->raw_event and ->event, so the next\ninput report dereferences freed memory.\n\nClear msc->input when the HID core did not claim an input device, so the\nexisting NULL checks cover this case as well.\n\n## Affected\n\n- `Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < c3597923932bb90d4fc2186aef552f6677175e4a`\n- `Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < e0c224c93d10ee38854fdf24c815108aedd3dcb3`\n- `Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14`\n- `Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 3d7a7bac4c75f25b2513505a0ac5ba909588ed2b`\n- `Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 9bdf8c7bfd79f1090e61d28f969b32880fd77bb3`\n- `Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 15b60ade825c8ce9ec560048a4ae3747e4572be3`\n- `Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 0bf253e9ac994cb5329bc87b00bb4eeca9136791`\n- `Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 2ef16934e069d5f771e989d6ee5c3ece5042f3cd`\n- `Linux >= f1a9a149abc86903e81dd1b2e720f3f89874384b < 0af3b89705688af01aa06025b84fa7a1e06ba6cc`\n- `Linux 0e55072e7c63a6569cab1447e9025d160abd9dd9`\n- `Linux >= 3.8.7 < 3.9`\n- `Linux 3.9`\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":[]}