{"id":"CVE-2025-68312","state":"PUBLISHED","title":"usbnet: Prevents free active kevent","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusbnet: Prevents free active kevent\n\nThe root cause of this issue are:\n1. When probing the usbnet device, executing usbnet_link_change(dev, 0, 0);\nput the kevent work in global workqueue. However, the kevent has not yet\nbeen scheduled when the usbnet device is unregistered. Therefore, executing\nfree_netdev() results in the \"free active object (kevent)\" error reported\nhere.\n\n2. Another factor is that when calling usbnet_disconnect()->unregister_netdev(),\nif the usbnet device is up, ndo_stop() is executed to cancel the kevent.\nHowever, because the device is not up, ndo_stop() is not executed.\n\nThe solution to this problem is to cancel the kevent before executing\nfree_netdev().","publishedAt":"2025-12-16T15:39:43.174Z","updatedAt":"2026-06-16T16:26:09.604Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8b4588b8b00b299be16a35be67b331d8fdba03f3","status":"affected","lessThan":"285d4b953f2ca03c358f986718dd89ee9bde632e","versionType":"git"},{"version":"135199a2edd459d2b123144efcd7f9bcd95128e4","status":"affected","lessThan":"88a38b135d69f5db9024ff6527232f1b51be8915","versionType":"git"},{"version":"635fd8953e4309b54ca6a81bed1d4a87668694f4","status":"affected","lessThan":"43005002b60ef3424719ecda16d124714b45da3b","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"3a10619fdefd3051aeb14860e4d4335529b4e94d","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"9a579d6a39513069d298eee70770bbac8a148565","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"2ce1de32e05445d77fc056f6ff8339cfb78a5f84","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"5158fb8da162e3982940f30cd01ed77bdf42c6fc","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"420c84c330d1688b8c764479e5738bbdbf0a33de","versionType":"git"},{"version":"d2d6b530d89b0a912148018027386aa049f0a309","status":"affected","versionType":"git"},{"version":"e2a521a7dcc463c5017b4426ca0804e151faeff7","status":"affected","versionType":"git"},{"version":"7f77dcbc030c2faa6d8e8a594985eeb34018409e","status":"affected","versionType":"git"},{"version":"d49bb8cf9bfaa06aa527eb30f1a52a071da2e32f","status":"affected","versionType":"git"},{"version":"db3b738ae5f726204876f4303c49cfdf4311403f","status":"affected","versionType":"git"},{"version":"5.4.211","status":"affected","lessThan":"5.4.302","versionType":"semver"},{"version":"5.10.137","status":"affected","lessThan":"5.10.247","versionType":"semver"},{"version":"5.15.61","status":"affected","lessThan":"5.15.197","versionType":"semver"},{"version":"4.9.326","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.291","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.256","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.18.18","status":"affected","lessThan":"5.19","versionType":"semver"},{"version":"5.19.2","status":"affected","lessThan":"5.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/usbnet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"5.4.302","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.247","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.197","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.159","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.117","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.58","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.8","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/usbnet.c"]}],"references":["https://git.kernel.org/stable/c/285d4b953f2ca03c358f986718dd89ee9bde632e","https://git.kernel.org/stable/c/88a38b135d69f5db9024ff6527232f1b51be8915","https://git.kernel.org/stable/c/43005002b60ef3424719ecda16d124714b45da3b","https://git.kernel.org/stable/c/3a10619fdefd3051aeb14860e4d4335529b4e94d","https://git.kernel.org/stable/c/9a579d6a39513069d298eee70770bbac8a148565","https://git.kernel.org/stable/c/2ce1de32e05445d77fc056f6ff8339cfb78a5f84","https://git.kernel.org/stable/c/5158fb8da162e3982940f30cd01ed77bdf42c6fc","https://git.kernel.org/stable/c/420c84c330d1688b8c764479e5738bbdbf0a33de"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/68xxx/CVE-2025-68312.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68312","state":"PUBLISHED","datePublished":"2025-12-16T15:39:43.174Z","dateUpdated":"2026-06-16T16:26:09.604Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-16T14:48:05.294Z"},"containers":{"cna":{"title":"usbnet: Prevents free active kevent","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusbnet: Prevents free active kevent\n\nThe root cause of this issue are:\n1. When probing the usbnet device, executing usbnet_link_change(dev, 0, 0);\nput the kevent work in global workqueue. However, the kevent has not yet\nbeen scheduled when the usbnet device is unregistered. Therefore, executing\nfree_netdev() results in the \"free active object (kevent)\" error reported\nhere.\n\n2. Another factor is that when calling usbnet_disconnect()->unregister_netdev(),\nif the usbnet device is up, ndo_stop() is executed to cancel the kevent.\nHowever, because the device is not up, ndo_stop() is not executed.\n\nThe solution to this problem is to cancel the kevent before executing\nfree_netdev()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8b4588b8b00b299be16a35be67b331d8fdba03f3","status":"affected","lessThan":"285d4b953f2ca03c358f986718dd89ee9bde632e","versionType":"git"},{"version":"135199a2edd459d2b123144efcd7f9bcd95128e4","status":"affected","lessThan":"88a38b135d69f5db9024ff6527232f1b51be8915","versionType":"git"},{"version":"635fd8953e4309b54ca6a81bed1d4a87668694f4","status":"affected","lessThan":"43005002b60ef3424719ecda16d124714b45da3b","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"3a10619fdefd3051aeb14860e4d4335529b4e94d","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"9a579d6a39513069d298eee70770bbac8a148565","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"2ce1de32e05445d77fc056f6ff8339cfb78a5f84","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"5158fb8da162e3982940f30cd01ed77bdf42c6fc","versionType":"git"},{"version":"a69e617e533edddf3fa3123149900f36e0a6dc74","status":"affected","lessThan":"420c84c330d1688b8c764479e5738bbdbf0a33de","versionType":"git"},{"version":"d2d6b530d89b0a912148018027386aa049f0a309","status":"affected","versionType":"git"},{"version":"e2a521a7dcc463c5017b4426ca0804e151faeff7","status":"affected","versionType":"git"},{"version":"7f77dcbc030c2faa6d8e8a594985eeb34018409e","status":"affected","versionType":"git"},{"version":"d49bb8cf9bfaa06aa527eb30f1a52a071da2e32f","status":"affected","versionType":"git"},{"version":"db3b738ae5f726204876f4303c49cfdf4311403f","status":"affected","versionType":"git"},{"version":"5.4.211","status":"affected","lessThan":"5.4.302","versionType":"semver"},{"version":"5.10.137","status":"affected","lessThan":"5.10.247","versionType":"semver"},{"version":"5.15.61","status":"affected","lessThan":"5.15.197","versionType":"semver"},{"version":"4.9.326","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.291","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.256","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.18.18","status":"affected","lessThan":"5.19","versionType":"semver"},{"version":"5.19.2","status":"affected","lessThan":"5.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/usbnet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"5.4.302","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.247","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.197","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.159","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.117","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.58","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.8","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/usbnet.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/285d4b953f2ca03c358f986718dd89ee9bde632e"},{"url":"https://git.kernel.org/stable/c/88a38b135d69f5db9024ff6527232f1b51be8915"},{"url":"https://git.kernel.org/stable/c/43005002b60ef3424719ecda16d124714b45da3b"},{"url":"https://git.kernel.org/stable/c/3a10619fdefd3051aeb14860e4d4335529b4e94d"},{"url":"https://git.kernel.org/stable/c/9a579d6a39513069d298eee70770bbac8a148565"},{"url":"https://git.kernel.org/stable/c/2ce1de32e05445d77fc056f6ff8339cfb78a5f84"},{"url":"https://git.kernel.org/stable/c/5158fb8da162e3982940f30cd01ed77bdf42c6fc"},{"url":"https://git.kernel.org/stable/c/420c84c330d1688b8c764479e5738bbdbf0a33de"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T16:02:40.215Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.211","versionEndExcluding":"5.4.302"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.137","versionEndExcluding":"5.10.247"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.61","versionEndExcluding":"5.15.197"},{"vulnerable":true,"criteria":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ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-16T16:25:55.310081Z","id":"CVE-2025-68312","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-16T16:26:09.604Z"}}]}}}