{"id":"CVE-2025-21776","state":"PUBLISHED","title":"USB: hub: Ignore non-compliant devices with too many configs or interfaces","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: hub: Ignore non-compliant devices with too many configs or interfaces\n\nRobert Morris created a test program which can cause\nusb_hub_to_struct_hub() to dereference a NULL or inappropriate\npointer:\n\nOops: general protection fault, probably for non-canonical address\n0xcccccccccccccccc: 0000 [#1] SMP DEBUG_PAGEALLOC PTI\nCPU: 7 UID: 0 PID: 117 Comm: kworker/7:1 Not tainted 6.13.0-rc3-00017-gf44d154d6e3d #14\nHardware name: FreeBSD BHYVE/BHYVE, BIOS 14.0 10/17/2021\nWorkqueue: usb_hub_wq hub_event\nRIP: 0010:usb_hub_adjust_deviceremovable+0x78/0x110\n...\nCall Trace:\n <TASK>\n ? die_addr+0x31/0x80\n ? exc_general_protection+0x1b4/0x3c0\n ? asm_exc_general_protection+0x26/0x30\n ? usb_hub_adjust_deviceremovable+0x78/0x110\n hub_probe+0x7c7/0xab0\n usb_probe_interface+0x14b/0x350\n really_probe+0xd0/0x2d0\n ? __pfx___device_attach_driver+0x10/0x10\n __driver_probe_device+0x6e/0x110\n driver_probe_device+0x1a/0x90\n __device_attach_driver+0x7e/0xc0\n bus_for_each_drv+0x7f/0xd0\n __device_attach+0xaa/0x1a0\n bus_probe_device+0x8b/0xa0\n device_add+0x62e/0x810\n usb_set_configuration+0x65d/0x990\n usb_generic_driver_probe+0x4b/0x70\n usb_probe_device+0x36/0xd0\n\nThe cause of this error is that the device has two interfaces, and the\nhub driver binds to interface 1 instead of interface 0, which is where\nusb_hub_to_struct_hub() looks.\n\nWe can prevent the problem from occurring by refusing to accept hub\ndevices that violate the USB spec by having more than one\nconfiguration or interface.","publishedAt":"2025-02-27T02:18:21.503Z","updatedAt":"2026-10-15T01:04:18.924Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"49f077106fa07919a6a6dda99bb490dd1d1a8218","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"d343fe0fad5c1d689775f2dda24a85ce98e29566","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"d3a67adb365cdfdac4620daf38a82e57ca45806c","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"c3720b04df84b5459050ae4e03ec7d545652f897","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"e905a0fca7bff0855d312c16f71e60e1773b393e","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"62d8f4c5454dd39aded4f343720d1c5a1803cfef","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"5b9778e1fe715700993ce436c152dc3b7df0b490","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"2240fed37afbcdb5e8b627bc7ad986891100e05d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/core/hub.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"5.4.291","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.235","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.179","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.129","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.79","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.16","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.4","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/core/hub.c"]}],"references":["https://git.kernel.org/stable/c/49f077106fa07919a6a6dda99bb490dd1d1a8218","https://git.kernel.org/stable/c/d343fe0fad5c1d689775f2dda24a85ce98e29566","https://git.kernel.org/stable/c/d3a67adb365cdfdac4620daf38a82e57ca45806c","https://git.kernel.org/stable/c/c3720b04df84b5459050ae4e03ec7d545652f897","https://git.kernel.org/stable/c/e905a0fca7bff0855d312c16f71e60e1773b393e","https://git.kernel.org/stable/c/62d8f4c5454dd39aded4f343720d1c5a1803cfef","https://git.kernel.org/stable/c/5b9778e1fe715700993ce436c152dc3b7df0b490","https://git.kernel.org/stable/c/2240fed37afbcdb5e8b627bc7ad986891100e05d","https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html","https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html","https://cert-portal.siemens.com/productcert/html/ssa-265688.html","https://cert-portal.siemens.com/productcert/html/ssa-503939.html","https://cert-portal.siemens.com/productcert/html/ssa-784472.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/21xxx/CVE-2025-21776.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21776","state":"PUBLISHED","datePublished":"2025-02-27T02:18:21.503Z","dateUpdated":"2026-10-15T01:04:18.924Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T08:45:45.763Z"},"containers":{"cna":{"title":"USB: hub: Ignore non-compliant devices with too many configs or interfaces","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: hub: Ignore non-compliant devices with too many configs or interfaces\n\nRobert Morris created a test program which can cause\nusb_hub_to_struct_hub() to dereference a NULL or inappropriate\npointer:\n\nOops: general protection fault, probably for non-canonical address\n0xcccccccccccccccc: 0000 [#1] SMP DEBUG_PAGEALLOC PTI\nCPU: 7 UID: 0 PID: 117 Comm: kworker/7:1 Not tainted 6.13.0-rc3-00017-gf44d154d6e3d #14\nHardware name: FreeBSD BHYVE/BHYVE, BIOS 14.0 10/17/2021\nWorkqueue: usb_hub_wq hub_event\nRIP: 0010:usb_hub_adjust_deviceremovable+0x78/0x110\n...\nCall Trace:\n <TASK>\n ? die_addr+0x31/0x80\n ? exc_general_protection+0x1b4/0x3c0\n ? asm_exc_general_protection+0x26/0x30\n ? usb_hub_adjust_deviceremovable+0x78/0x110\n hub_probe+0x7c7/0xab0\n usb_probe_interface+0x14b/0x350\n really_probe+0xd0/0x2d0\n ? __pfx___device_attach_driver+0x10/0x10\n __driver_probe_device+0x6e/0x110\n driver_probe_device+0x1a/0x90\n __device_attach_driver+0x7e/0xc0\n bus_for_each_drv+0x7f/0xd0\n __device_attach+0xaa/0x1a0\n bus_probe_device+0x8b/0xa0\n device_add+0x62e/0x810\n usb_set_configuration+0x65d/0x990\n usb_generic_driver_probe+0x4b/0x70\n usb_probe_device+0x36/0xd0\n\nThe cause of this error is that the device has two interfaces, and the\nhub driver binds to interface 1 instead of interface 0, which is where\nusb_hub_to_struct_hub() looks.\n\nWe can prevent the problem from occurring by refusing to accept hub\ndevices that violate the USB spec by having more than one\nconfiguration or interface."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"49f077106fa07919a6a6dda99bb490dd1d1a8218","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"d343fe0fad5c1d689775f2dda24a85ce98e29566","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"d3a67adb365cdfdac4620daf38a82e57ca45806c","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"c3720b04df84b5459050ae4e03ec7d545652f897","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"e905a0fca7bff0855d312c16f71e60e1773b393e","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"62d8f4c5454dd39aded4f343720d1c5a1803cfef","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"5b9778e1fe715700993ce436c152dc3b7df0b490","versionType":"git"},{"version":"d2123fd9e1a56b8006986ed37e0aaf93ef0dd978","status":"affected","lessThan":"2240fed37afbcdb5e8b627bc7ad986891100e05d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/core/hub.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"5.4.291","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.235","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.179","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.129","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.79","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.16","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.4","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/core/hub.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/49f077106fa07919a6a6dda99bb490dd1d1a8218"},{"url":"https://git.kernel.org/stable/c/d343fe0fad5c1d689775f2dda24a85ce98e29566"},{"url":"https://git.kernel.org/stable/c/d3a67adb365cdfdac4620daf38a82e57ca45806c"},{"url":"https://git.kernel.org/stable/c/c3720b04df84b5459050ae4e03ec7d545652f897"},{"url":"https://git.kernel.org/stable/c/e905a0fca7bff0855d312c16f71e60e1773b393e"},{"url":"https://git.kernel.org/stable/c/62d8f4c5454dd39aded4f343720d1c5a1803cfef"},{"url":"https://git.kernel.org/stable/c/5b9778e1fe715700993ce436c152dc3b7df0b490"},{"url":"https://git.kernel.org/stable/c/2240fed37afbcdb5e8b627bc7ad986891100e05d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:06:12.467Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.4.291"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.10.235"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.15.179"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.1.129"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.6.79"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.12.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.13.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.14"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE 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