CVE-2025-21916None▾ SunlitIn 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…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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 ...
Linux >= 23926d316d2836315cb113569f91393266eb5b47 < dcd592ab9dd8a2bfc36e75583b9006db2a77ec24Linux >= 75ddbf776dd04a09fb9e5267ead5d0c989f84506 < 319529e0356bd904528c64647725a2272d297c83Linux >= 1aac4be1aaa5177506219f01dce5e29194e5e95a < bf4409f84023b52b5e9b36c0a071a121eee42138Linux >= 5584c776a1af7807ca815ee6265f2c1429fc5727 < 197e78076c5ecd895f109158c4ea2954b9919af6Linux >= f536f09eb45e4de8d1b9accee9d992aa1846f1d4 < a0475a885d69849b1ade38add6d64338dfa83a8fLinux >= 2eabb655a968b862bc0c31629a09f0fbf3c80d51 < cfc295f7cccf66cbd5123416bcf1bee2e1bd37deLinux >= 2eabb655a968b862bc0c31629a09f0fbf3c80d51 < 903b80c21458bb1e34c3a78c5fdc553821e357f8Linux >= 2eabb655a968b862bc0c31629a09f0fbf3c80d51 < c90aad369899a607cfbc002bebeafd51e31900cdLinux 5159a81924311c1ec786ad9fdef784ead8676a6aLinux ac9007520e392541a29daebaae8b9109007bc781Linux >= 5.4.279 < 5.4.291Linux >= 5.10.221 < 5.10.235Linux >= 5.15.162 < 5.15.179Linux >= 6.1.97 < 6.1.131Linux >= 6.6.37 < 6.6.83Linux >= 4.19.317 < 4.20Linux >= 6.9.8 < 6.10Linux 6.10Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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