Answer in brief
CVE-2025-21916 records a Medium severity (CVSS 5.5) vulnerability in usb: atm: cxacru: fix a flaw in existing endpoint checks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.10:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.10:rc7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=23926d316d2836315cb113569f91393266eb5b47 <dcd592ab9dd8a2bfc36e75583b9006db2a77ec24 || >=75ddbf776dd04a09fb9e5267ead5d0c989f84506 <319529e0356bd904528c64647725a2272d297c83 || >=1aac4be1aaa5177506219f01dce5e29194e5e95a <bf4409f84023b52b5e9b36c0a071a121eee42138 || >=5584c776a1af7807ca815ee6265f2c1429fc5727 <197e78076c5ecd895f109158c4ea2954b9919af6 || >=f536f09eb45e4de8d1b9accee9d992aa1846f1d4 <a0475a885d69849b1ade38add6d64338dfa83a8f || >=2eabb655a968b862bc0c31629a09f0fbf3c80d51 <cfc295f7cccf66cbd5123416bcf1bee2e1bd37de || >=2eabb655a968b862bc0c31629a09f0fbf3c80d51 <903b80c21458bb1e34c3a78c5fdc553821e357f8 || >=2eabb655a968b862bc0c31629a09f0fbf3c80d51 <c90aad369899a607cfbc002bebeafd51e31900cd || 5159a81924311c1ec786ad9fdef784ead8676a6a || ac9007520e392541a29daebaae8b9109007bc781 || >=5.4.279 <5.4.291 || >=5.10.221 <5.10.235 || >=5.15.162 <5.15.179 || >=6.1.97 <6.1.131 || >=6.6.37 <6.6.83 || >=4.19.317 <4.20 || >=6.9.8 <6.10 | dcd592ab9dd8a2bfc36e75583b9006db2a77ec24, 319529e0356bd904528c64647725a2272d297c83, bf4409f84023b52b5e9b36c0a071a121eee42138, 197e78076c5ecd895f109158c4ea2954b9919af6, a0475a885d69849b1ade38add6d64338dfa83a8f, cfc295f7cccf66cbd5123416bcf1bee2e1bd37de, 903b80c21458bb1e34c3a78c5fdc553821e357f8, c90aad369899a607cfbc002bebeafd51e31900cd, 5.4.291, 5.10.235, 5.15.179, 6.1.131, 6.6.83, 4.20, 6.10 |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Apr 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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 ...
Quoted source text, attributed separately from HOL analysis.