{"id":"CVE-2025-21916","summary":"usb: atm: cxacru: fix a flaw in existing endpoint checks","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: atm: cxacru: fix a flaw in existing endpoint checks\n\nSyzbot once again identified a flaw in usb endpoint checking, see [1].\nThis time the issue stems from a commit authored by me (2eabb655a968\n(\"usb: atm: cxacru: fix endpoint checking in cxacru_bind()\")).\n\nWhile using usb_find_common_endpoints() may usually be enough to\ndiscard devices with wrong endpoints, in this case one needs more\nthan just finding and identifying the sufficient number of endpoints\nof correct types - one needs to check the endpoint's address as well.\n\nSince cxacru_bind() fills URBs with CXACRU_EP_CMD address in mind,\nswitch the endpoint verification approach to usb_check_XXX_endpoints()\ninstead to fix incomplete ep testing.\n\n[1] Syzbot report:\nusb 5-1: BOGUS urb xfer, pipe 3 != type 1\nWARNING: CPU: 0 PID: 1378 at drivers/usb/core/urb.c:504 usb_submit_urb+0xc4e/0x18c0 drivers/usb/core/urb.c:503\n...\nRIP: 0010:usb_submit_urb+0xc4e/0x18c0 drivers/usb/core/urb.c:503\n...\nCall Trace:\n \u003cTASK\u003e\n cxacru_cm+0x3c8/0xe50 drivers/usb/atm/cxacru.c:649\n cxacru_card_status drivers/usb/atm/cxacru.c:760 [inline]\n cxacru_bind+0xcf9/0x1150 drivers/usb/atm/cxacru.c:1223\n usbatm_usb_probe+0x314/0x1d30 drivers/usb/atm/usbatm.c:1058\n cxacru_usb_probe+0x184/0x220 drivers/usb/atm/cxacru.c:1377\n usb_probe_interface+0x641/0xbb0 drivers/usb/core/driver.c:396\n really_probe+0x2b9/0xad0 drivers/base/dd.c:658\n __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800\n driver_probe_device+0x50/0x430 drivers/base/dd.c:830\n...","modified":"2026-04-02T12:45:17.139865Z","published":"2025-04-01T15:40:52.519Z","related":["SUSE-SU-2025:01614-1","SUSE-SU-2025:01707-1","SUSE-SU-2025:01919-1","SUSE-SU-2025:01951-1","SUSE-SU-2025:01964-1","SUSE-SU-2025:01967-1","SUSE-SU-2025:1293-1","SUSE-SU-2025:20192-1","SUSE-SU-2025:20206-1","SUSE-SU-2025:20270-1","SUSE-SU-2025:20283-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21916.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/197e78076c5ecd895f109158c4ea2954b9919af6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/319529e0356bd904528c64647725a2272d297c83"},{"type":"WEB","url":"https://git.kernel.org/stable/c/903b80c21458bb1e34c3a78c5fdc553821e357f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a0475a885d69849b1ade38add6d64338dfa83a8f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bf4409f84023b52b5e9b36c0a071a121eee42138"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c90aad369899a607cfbc002bebeafd51e31900cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cfc295f7cccf66cbd5123416bcf1bee2e1bd37de"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dcd592ab9dd8a2bfc36e75583b9006db2a77ec24"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21916.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21916"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"23926d316d2836315cb113569f91393266eb5b47"},{"fixed":"dcd592ab9dd8a2bfc36e75583b9006db2a77ec24"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"75ddbf776dd04a09fb9e5267ead5d0c989f84506"},{"fixed":"319529e0356bd904528c64647725a2272d297c83"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1aac4be1aaa5177506219f01dce5e29194e5e95a"},{"fixed":"bf4409f84023b52b5e9b36c0a071a121eee42138"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5584c776a1af7807ca815ee6265f2c1429fc5727"},{"fixed":"197e78076c5ecd895f109158c4ea2954b9919af6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f536f09eb45e4de8d1b9accee9d992aa1846f1d4"},{"fixed":"a0475a885d69849b1ade38add6d64338dfa83a8f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2eabb655a968b862bc0c31629a09f0fbf3c80d51"},{"fixed":"cfc295f7cccf66cbd5123416bcf1bee2e1bd37de"},{"fixed":"903b80c21458bb1e34c3a78c5fdc553821e357f8"},{"fixed":"c90aad369899a607cfbc002bebeafd51e31900cd"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"5159a81924311c1ec786ad9fdef784ead8676a6a"},{"last_affected":"ac9007520e392541a29daebaae8b9109007bc781"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21916.json"}}],"schema_version":"1.7.5"}