← CVE Intelligence

CVE-2025-21916

usb: atm: cxacru: fix a flaw in existing endpoint checks PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: usb: atm: cxacru: fix a flaw in existing endpoint checks Syzbot once again identified a flaw in usb endpoint checking, see [1]. This time the issue stems from a commit authored by me (2eabb655a968 ("usb: atm: cxacru: fix endpoint checking in cxacru_bind()")). While using usb_find_common_endpoints() may usually be enough to discard devices with wrong endpoints, in this case one needs more than just finding and identifying the sufficient number of endpoints of correct types - one needs to check the endpoint's address as well. Since cxacru_bind() fills URBs with CXACRU_EP_CMD address in mind, switch the endpoint verification approach to usb_check_XXX_endpoints() instead to fix incomplete ep testing. [1] Syzbot report: usb 5-1: BOGUS urb xfer, pipe 3 != type 1 WARNING: CPU: 0 PID: 1378 at drivers/usb/core/urb.c:504 usb_submit_urb+0xc4e/0x18c0 drivers/usb/core/urb.c:503 ... RIP: 0010:usb_submit_urb+0xc4e/0x18c0 drivers/usb/core/urb.c:503 ... Call Trace: <TASK> cxacru_cm+0x3c8/0xe50 drivers/usb/atm/cxacru.c:649 cxacru_card_status drivers/usb/atm/cxacru.c:760 [inline] cxacru_bind+0xcf9/0x1150 drivers/usb/atm/cxacru.c:1223 usbatm_usb_probe+0x314/0x1d30 drivers/usb/atm/usbatm.c:1058 cxacru_usb_probe+0x184/0x220 drivers/usb/atm/cxacru.c:1377 usb_probe_interface+0x641/0xbb0 drivers/usb/core/driver.c:396 really_probe+0x2b9/0xad0 drivers/base/dd.c:658 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800 driver_probe_device+0x50/0x430 drivers/base/dd.c:830 ...

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 23926d316d2836315cb113569f91393266eb5b47 before dcd592ab9dd8a2bfc36e75583b9006db2a77ec24; affected 75ddbf776dd04a09fb9e5267ead5d0c989f84506 before 319529e0356bd904528c64647725a2272d297c83; affected 1aac4be1aaa5177506219f01dce5e29194e5e95a before bf4409f84023b52b5e9b36c0a071a121eee42138; affected 5584c776a1af7807ca815ee6265f2c1429fc5727 before 197e78076c5ecd895f109158c4ea2954b9919af6; affected f536f09eb45e4de8d1b9accee9d992aa1846f1d4 before a0475a885d69849b1ade38add6d64338dfa83a8f; affected 2eabb655a968b862bc0c31629a09f0fbf3c80d51 before cfc295f7cccf66cbd5123416bcf1bee2e1bd37de; affected 2eabb655a968b862bc0c31629a09f0fbf3c80d51 before 903b80c21458bb1e34c3a78c5fdc553821e357f8; affected 2eabb655a968b862bc0c31629a09f0fbf3c80d51 before c90aad369899a607cfbc002bebeafd51e31900cd; affected 5159a81924311c1ec786ad9fdef784ead8676a6a; affected ac9007520e392541a29daebaae8b9109007bc781; affected 5.4.279 before 5.4.291; affected 5.10.221 before 5.10.235; affected 5.15.162 before 5.15.179; affected 6.1.97 before 6.1.131; affected 6.6.37 before 6.6.83; affected 4.19.317 before 4.20; affected 6.9.8 before 6.10
Linux / Linuxaffected 6.10; unaffected 0 before 6.10; unaffected 5.4.291 through 5.4.*; unaffected 5.10.235 through 5.10.*; unaffected 5.15.179 through 5.15.*; unaffected 6.1.131 through 6.1.*; unaffected 6.6.83 through 6.6.*; unaffected 6.12.19 through 6.12.*; unaffected 6.13.7 through 6.13.*; unaffected 6.14 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CVE

No English description supplied.