{"id":"CVE-2021-47120","state":"PUBLISHED","title":"HID: magicmouse: fix NULL-deref on disconnect","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: magicmouse: fix NULL-deref on disconnect\n\nCommit 9d7b18668956 (\"HID: magicmouse: add support for Apple Magic\nTrackpad 2\") added a sanity check for an Apple trackpad but returned\nsuccess instead of -ENODEV when the check failed. This means that the\nremove callback will dereference the never-initialised driver data\npointer when the driver is later unbound (e.g. on USB disconnect).","publishedAt":"2024-03-15T20:14:26.578Z","updatedAt":"2026-05-11T13:48:26.150Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9d7b18668956c411a422d04c712994c5fdb23a4b","status":"affected","lessThan":"368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6","versionType":"git"},{"version":"9d7b18668956c411a422d04c712994c5fdb23a4b","status":"affected","lessThan":"b5d013c4c76b276890135b5d32803c4c63924b77","versionType":"git"},{"version":"9d7b18668956c411a422d04c712994c5fdb23a4b","status":"affected","lessThan":"9cf27473f21913a3eaf4702dd2a25415afd5f33f","versionType":"git"},{"version":"9d7b18668956c411a422d04c712994c5fdb23a4b","status":"affected","lessThan":"4b4f6cecca446abcb686c6e6c451d4f1ec1a7497","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-magicmouse.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.125","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.43","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.12.10","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-magicmouse.c"]}],"references":["https://git.kernel.org/stable/c/368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6","https://git.kernel.org/stable/c/b5d013c4c76b276890135b5d32803c4c63924b77","https://git.kernel.org/stable/c/9cf27473f21913a3eaf4702dd2a25415afd5f33f","https://git.kernel.org/stable/c/4b4f6cecca446abcb686c6e6c451d4f1ec1a7497"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47120.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47120","state":"PUBLISHED","datePublished":"2024-03-15T20:14:26.578Z","dateUpdated":"2026-05-11T13:48:26.150Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-04T18:12:48.838Z"},"containers":{"cna":{"title":"HID: magicmouse: fix NULL-deref on disconnect","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: magicmouse: fix NULL-deref on disconnect\n\nCommit 9d7b18668956 (\"HID: magicmouse: add support for Apple Magic\nTrackpad 2\") added a sanity check for an Apple trackpad but returned\nsuccess instead of -ENODEV when the check failed. This means that the\nremove callback will dereference the never-initialised driver data\npointer when the driver is later unbound (e.g. on USB disconnect)."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9d7b18668956c411a422d04c712994c5fdb23a4b","status":"affected","lessThan":"368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6","versionType":"git"},{"version":"9d7b18668956c411a422d04c712994c5fdb23a4b","status":"affected","lessThan":"b5d013c4c76b276890135b5d32803c4c63924b77","versionType":"git"},{"version":"9d7b18668956c411a422d04c712994c5fdb23a4b","status":"affected","lessThan":"9cf27473f21913a3eaf4702dd2a25415afd5f33f","versionType":"git"},{"version":"9d7b18668956c411a422d04c712994c5fdb23a4b","status":"affected","lessThan":"4b4f6cecca446abcb686c6e6c451d4f1ec1a7497","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-magicmouse.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.125","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.43","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.12.10","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-magicmouse.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6"},{"url":"https://git.kernel.org/stable/c/b5d013c4c76b276890135b5d32803c4c63924b77"},{"url":"https://git.kernel.org/stable/c/9cf27473f21913a3eaf4702dd2a25415afd5f33f"},{"url":"https://git.kernel.org/stable/c/4b4f6cecca446abcb686c6e6c451d4f1ec1a7497"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:48:26.150Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.125"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.10.43"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.12.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.13"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47120","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-03-19T15:24:16.763009Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-06-04T17:13:25.270Z"}},{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/b5d013c4c76b276890135b5d32803c4c63924b77","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/9cf27473f21913a3eaf4702dd2a25415afd5f33f","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/4b4f6cecca446abcb686c6e6c451d4f1ec1a7497","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:24:39.876Z"}}]}}}