{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-21877", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21877", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-03-27T14:57:07.462Z", "updatedAt": "2026-05-11T21:08:15.045Z", "importedAt": "2026-10-24T01:57:29.455Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "usbnet: gl620a: fix endpoint checking in genelink_bind()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nusbnet: gl620a: fix endpoint checking in genelink_bind()\n\nSyzbot reports [1] a warning in usb_submit_urb() triggered by\ninconsistencies between expected and actually present endpoints\nin gl620a driver. Since genelink_bind() does not properly\nverify whether specified eps are in fact provided by the device,\nin this case, an artificially manufactured one, one may get a\nmismatch.\n\nFix the issue by resorting to a usbnet utility function\nusbnet_get_endpoints(), usually reserved for this very problem.\nCheck for endpoints and return early before proceeding further if\nany are missing.\n\n[1] Syzbot report:\nusb 5-1: Manufacturer: syz\nusb 5-1: SerialNumber: syz\nusb 5-1: config 0 descriptor??\ngl620a 5-1:0.23 usb0: register 'gl620a' at usb-dummy_hcd.0-1, ...\n------------[ cut here ]------------\nusb 5-1: BOGUS urb xfer, pipe 3 != type 1\nWARNING: CPU: 2 PID: 1841 at drivers/usb/core/urb.c:503 usb_submit_urb+0xe4b/0x1730 drivers/usb/core/urb.c:503\nModules linked in:\nCPU: 2 UID: 0 PID: 1841 Comm: kworker/2:2 Not tainted 6.12.0-syzkaller-07834-g06afb0f36106 #0\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\nWorkqueue: mld mld_ifc_work\nRIP: 0010:usb_submit_urb+0xe4b/0x1730 drivers/usb/core/urb.c:503\n...\nCall Trace:\n \n usbnet_start_xmit+0x6be/0x2780 drivers/net/usb/usbnet.c:1467\n __netdev_start_xmit include/linux/netdevice.h:5002 [inline]\n netdev_start_xmit include/linux/netdevice.h:5011 [inline]\n xmit_one net/core/dev.c:3590 [inline]\n dev_hard_start_xmit+0x9a/0x7b0 net/core/dev.c:3606\n sch_direct_xmit+0x1ae/0xc30 net/sched/sch_generic.c:343\n __dev_xmit_skb net/core/dev.c:3827 [inline]\n __dev_queue_xmit+0x13d4/0x43e0 net/core/dev.c:4400\n dev_queue_xmit include/linux/netdevice.h:3168 [inline]\n neigh_resolve_output net/core/neighbour.c:1514 [inline]\n neigh_resolve_output+0x5bc/0x950 net/core/neighbour.c:1494\n neigh_output include/net/neighbour.h:539 [inline]\n ip6_finish_output2+0xb1b/0x2070 net/ipv6/ip6_output.c:141\n __ip6_finish_output net/ipv6/ip6_output.c:215 [inline]\n ip6_finish_output+0x3f9/0x1360 net/ipv6/ip6_output.c:226\n NF_HOOK_COND include/linux/netfilter.h:303 [inline]\n ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:247\n dst_output include/net/dst.h:450 [inline]\n NF_HOOK include/linux/netfilter.h:314 [inline]\n NF_HOOK include/linux/netfilter.h:308 [inline]\n mld_sendpack+0x9f0/0x11d0 net/ipv6/mcast.c:1819\n mld_send_cr net/ipv6/mcast.c:2120 [inline]\n mld_ifc_work+0x740/0xca0 net/ipv6/mcast.c:2651\n process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229\n process_scheduled_works kernel/workqueue.c:3310 [inline]\n worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391\n kthread+0x2c1/0x3a0 kernel/kthread.c:389\n ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n ", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "47ee3051c856cc2aa95d35d577a8cb37279d540f", "status": "affected", "versionType": "git", "lessThan": "5f2dbabbce04b1ffcd6d8d07564adb94db577536" }, { "version": "47ee3051c856cc2aa95d35d577a8cb37279d540f", "status": "affected", "versionType": "git", "lessThan": "24dd971104057c8828d420a48e0a5af6e6f30d3e" }, { "version": "47ee3051c856cc2aa95d35d577a8cb37279d540f", "status": "affected", "versionType": "git", "lessThan": "9bcb8cbc3e5d67eb223bfb7e2291a270dbb699dc" }, { "version": "47ee3051c856cc2aa95d35d577a8cb37279d540f", "status": "affected", "versionType": "git", "lessThan": "67ebc3391c8377738e97a43374054d9718fdb6e4" }, { "version": "47ee3051c856cc2aa95d35d577a8cb37279d540f", "status": "affected", "versionType": "git", "lessThan": "a2ee5e55b50a97d13617c8653482c0ad4decff8c" }, { "version": "47ee3051c856cc2aa95d35d577a8cb37279d540f", "status": "affected", "versionType": "git", "lessThan": "4e8b8d43373bf837be159366f0192502f97ec7a5" }, { "version": "47ee3051c856cc2aa95d35d577a8cb37279d540f", "status": "affected", "versionType": "git", "lessThan": "ded25730c96949cb8b048b29c557e38569124943" }, { "version": "47ee3051c856cc2aa95d35d577a8cb37279d540f", "status": "affected", "versionType": "git", "lessThan": "1cf9631d836b289bd5490776551961c883ae8a4f" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.14", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.14" }, { "version": "5.4.291", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.235", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.179", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.130", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.81", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.18", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.13.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.13.*" }, { "version": "6.14", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }