{"id":"CVE-2021-47173","state":"PUBLISHED","title":"misc/uss720: fix memory leak in uss720_probe","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc/uss720: fix memory leak in uss720_probe\n\nuss720_probe forgets to decrease the refcount of usbdev in uss720_probe.\nFix this by decreasing the refcount of usbdev by usb_put_dev.\n\nBUG: memory leak\nunreferenced object 0xffff888101113800 (size 2048):\n  comm \"kworker/0:1\", pid 7, jiffies 4294956777 (age 28.870s)\n  hex dump (first 32 bytes):\n    ff ff ff ff 31 00 00 00 00 00 00 00 00 00 00 00  ....1...........\n    00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00  ................\n  backtrace:\n    [<ffffffff82b8e822>] kmalloc include/linux/slab.h:554 [inline]\n    [<ffffffff82b8e822>] kzalloc include/linux/slab.h:684 [inline]\n    [<ffffffff82b8e822>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582\n    [<ffffffff82b98441>] hub_port_connect drivers/usb/core/hub.c:5129 [inline]\n    [<ffffffff82b98441>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]\n    [<ffffffff82b98441>] port_event drivers/usb/core/hub.c:5509 [inline]\n    [<ffffffff82b98441>] hub_event+0x1171/0x20c0 drivers/usb/core/hub.c:5591\n    [<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275\n    [<ffffffff81259b19>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421\n    [<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292\n    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294","publishedAt":"2024-03-25T09:16:24.466Z","updatedAt":"2026-05-11T13:49:23.402Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0f36163d3abefbda1b21a330b3fdf3c2dc076d94","status":"affected","lessThan":"5f46b2410db2c8f26b8bb91b40deebf4ec184391","versionType":"git"},{"version":"0f36163d3abefbda1b21a330b3fdf3c2dc076d94","status":"affected","lessThan":"7889c70e6173ef358f3cd7578db127a489035a42","versionType":"git"},{"version":"0f36163d3abefbda1b21a330b3fdf3c2dc076d94","status":"affected","lessThan":"bcb30cc8f8befcbdbcf7a016e4dfd4747c54a364","versionType":"git"},{"version":"0f36163d3abefbda1b21a330b3fdf3c2dc076d94","status":"affected","lessThan":"386918878ce4cd676e4607233866e03c9399a46a","versionType":"git"},{"version":"0f36163d3abefbda1b21a330b3fdf3c2dc076d94","status":"affected","lessThan":"36b5ff1db1a4ef4fdbc2bae364344279f033ad88","versionType":"git"},{"version":"0f36163d3abefbda1b21a330b3fdf3c2dc076d94","status":"affected","lessThan":"5394ae9d8c7961dd93807fdf1b12a1dde96b0a55","versionType":"git"},{"version":"0f36163d3abefbda1b21a330b3fdf3c2dc076d94","status":"affected","lessThan":"a3c3face38cb49932c62adcc1289914f1c742096","versionType":"git"},{"version":"0f36163d3abefbda1b21a330b3fdf3c2dc076d94","status":"affected","lessThan":"dcb4b8ad6a448532d8b681b5d1a7036210b622de","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/misc/uss720.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.14","versionType":"semver"},{"version":"4.4.271","status":"unaffected","lessThanOrEqual":"4.4.*","versionType":"semver"},{"version":"4.9.271","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.235","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.193","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.124","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.42","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.12.9","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/usb/misc/uss720.c"]}],"references":["https://git.kernel.org/stable/c/5f46b2410db2c8f26b8bb91b40deebf4ec184391","https://git.kernel.org/stable/c/7889c70e6173ef358f3cd7578db127a489035a42","https://git.kernel.org/stable/c/bcb30cc8f8befcbdbcf7a016e4dfd4747c54a364","https://git.kernel.org/stable/c/386918878ce4cd676e4607233866e03c9399a46a","https://git.kernel.org/stable/c/36b5ff1db1a4ef4fdbc2bae364344279f033ad88","https://git.kernel.org/stable/c/5394ae9d8c7961dd93807fdf1b12a1dde96b0a55","https://git.kernel.org/stable/c/a3c3face38cb49932c62adcc1289914f1c742096","https://git.kernel.org/stable/c/dcb4b8ad6a448532d8b681b5d1a7036210b622de"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47173.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47173","state":"PUBLISHED","datePublished":"2024-03-25T09:16:24.466Z","dateUpdated":"2026-05-11T13:49:23.402Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-25T09:12:14.111Z"},"containers":{"cna":{"title":"misc/uss720: fix memory leak in uss720_probe","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc/uss720: fix memory leak in uss720_probe\n\nuss720_probe forgets to decrease the refcount of usbdev in uss720_probe.\nFix this by decreasing the refcount of usbdev by usb_put_dev.\n\nBUG: memory leak\nunreferenced object 0xffff888101113800 (size 2048):\n  comm \"kworker/0:1\", pid 7, jiffies 4294956777 (age 28.870s)\n  hex dump (first 32 bytes):\n    ff ff ff ff 31 00 00 00 00 00 00 00 00 00 00 00  ....1...........\n    00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00  ................\n  backtrace:\n    [<ffffffff82b8e822>] kmalloc include/linux/slab.h:554 [inline]\n    [<ffffffff82b8e822>] kzalloc include/linux/slab.h:684 [inline]\n    [<ffffffff82b8e822>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582\n    [<ffffffff82b98441>] hub_port_connect drivers/usb/core/hub.c:5129 [inline]\n    [<ffffffff82b98441>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]\n    [<ffffffff82b98441>] port_event drivers/usb/core/hub.c:5509 [inline]\n    [<ffffffff82b98441>] hub_event+0x1171/0x20c0 drivers/usb/core/hub.c:5591\n    [<ffffffff81259229>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275\n    [<ffffffff81259b19>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421\n    [<ffffffff81261228>] kthread+0x178/0x1b0 kernel/kthread.c:292\n    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 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