{"id":"CVE-2026-64547","state":"PUBLISHED","title":"net: usb: net1080: validate packet_len before pad-byte access in rx_fixup","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: net1080: validate packet_len before pad-byte access in rx_fixup\n\nFor an even packet_len, net1080_rx_fixup() reads the pad byte at\nskb->data[packet_len] before the skb->len != packet_len check further\ndown, and packet_len is only bounded against NC_MAX_PACKET. A malicious\nNetChip 1080 device can send a short frame advertising a large even\npacket_len (e.g. 0x4000), so the pad-byte read lands past the end of the\nskb:\n\n  BUG: KASAN: slab-out-of-bounds in net1080_rx_fixup\n  Read of size 1 at addr ffff8880106c83c6 by task ksoftirqd/0/14\n   ...\n   net1080_rx_fixup (drivers/net/usb/net1080.c:384)\n   usbnet_bh (drivers/net/usb/usbnet.c:1589)\n   process_one_work (kernel/workqueue.c:3322)\n   bh_worker (kernel/workqueue.c:3708)\n   tasklet_action (kernel/softirq.c:965)\n   handle_softirqs (kernel/softirq.c:622)\n   ...\n\nReject the frame when packet_len >= skb->len before reading.","publishedAt":"2026-07-27T20:10:37.786Z","updatedAt":"2026-10-19T20:48:40.168Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"f42217fa7d535e9ec4151f7971f06f6ea65e850a","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"c087749815379e9af2fdbeb08bfc33870b103958","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"e4a87126c085b097d29e17e3b7647295bba8be7c","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"685e92934f11d5e215dad58813e2f9955ac2f436","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"4dc8484be3302d187274364820d3bef6c62bde32","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"b153cfe84b1340c69a13d0957665a2bfcf21239c","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"ea866cab12db1a2100b400a8b03569e5bc0ee29a","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"03f384bc0cb8d4a1301d4f5b0baef2d980258383","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/net1080.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.14","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","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/net1080.c"]}],"references":["https://git.kernel.org/stable/c/f42217fa7d535e9ec4151f7971f06f6ea65e850a","https://git.kernel.org/stable/c/c087749815379e9af2fdbeb08bfc33870b103958","https://git.kernel.org/stable/c/e4a87126c085b097d29e17e3b7647295bba8be7c","https://git.kernel.org/stable/c/685e92934f11d5e215dad58813e2f9955ac2f436","https://git.kernel.org/stable/c/4dc8484be3302d187274364820d3bef6c62bde32","https://git.kernel.org/stable/c/b153cfe84b1340c69a13d0957665a2bfcf21239c","https://git.kernel.org/stable/c/ea866cab12db1a2100b400a8b03569e5bc0ee29a","https://git.kernel.org/stable/c/03f384bc0cb8d4a1301d4f5b0baef2d980258383"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64547.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64547","state":"PUBLISHED","datePublished":"2026-07-27T20:10:37.786Z","dateUpdated":"2026-10-19T20:48:40.168Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.795Z"},"containers":{"cna":{"title":"net: usb: net1080: validate packet_len before pad-byte access in rx_fixup","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: net1080: validate packet_len before pad-byte access in rx_fixup\n\nFor an even packet_len, net1080_rx_fixup() reads the pad byte at\nskb->data[packet_len] before the skb->len != packet_len check further\ndown, and packet_len is only bounded against NC_MAX_PACKET. A malicious\nNetChip 1080 device can send a short frame advertising a large even\npacket_len (e.g. 0x4000), so the pad-byte read lands past the end of the\nskb:\n\n  BUG: KASAN: slab-out-of-bounds in net1080_rx_fixup\n  Read of size 1 at addr ffff8880106c83c6 by task ksoftirqd/0/14\n   ...\n   net1080_rx_fixup (drivers/net/usb/net1080.c:384)\n   usbnet_bh (drivers/net/usb/usbnet.c:1589)\n   process_one_work (kernel/workqueue.c:3322)\n   bh_worker (kernel/workqueue.c:3708)\n   tasklet_action (kernel/softirq.c:965)\n   handle_softirqs (kernel/softirq.c:622)\n   ...\n\nReject the frame when packet_len >= skb->len before reading."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"f42217fa7d535e9ec4151f7971f06f6ea65e850a","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"c087749815379e9af2fdbeb08bfc33870b103958","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"e4a87126c085b097d29e17e3b7647295bba8be7c","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"685e92934f11d5e215dad58813e2f9955ac2f436","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"4dc8484be3302d187274364820d3bef6c62bde32","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"b153cfe84b1340c69a13d0957665a2bfcf21239c","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"ea866cab12db1a2100b400a8b03569e5bc0ee29a","versionType":"git"},{"version":"904813cd8a0b334189da285bb05af0b18b062502","status":"affected","lessThan":"03f384bc0cb8d4a1301d4f5b0baef2d980258383","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/usb/net1080.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.14","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","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/net1080.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f42217fa7d535e9ec4151f7971f06f6ea65e850a"},{"url":"https://git.kernel.org/stable/c/c087749815379e9af2fdbeb08bfc33870b103958"},{"url":"https://git.kernel.org/stable/c/e4a87126c085b097d29e17e3b7647295bba8be7c"},{"url":"https://git.kernel.org/stable/c/685e92934f11d5e215dad58813e2f9955ac2f436"},{"url":"https://git.kernel.org/stable/c/4dc8484be3302d187274364820d3bef6c62bde32"},{"url":"https://git.kernel.org/stable/c/b153cfe84b1340c69a13d0957665a2bfcf21239c"},{"url":"https://git.kernel.org/stable/c/ea866cab12db1a2100b400a8b03569e5bc0ee29a"},{"url":"https://git.kernel.org/stable/c/03f384bc0cb8d4a1301d4f5b0baef2d980258383"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":8.1,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - net1080 implements a point-to-point Ethernet link over a USB host-to-host cable, so the malformed NC frame originates from the logically adjacent peer host/device on that link rather than from a local user; a compromised peer (or a gadget-mode board presenting 0525:1080, which autoloads the default-y driver) sends the frame over an already-established link with no physical interaction at attack time.\nAC:L - The attacker fully and deterministically controls packet_len and the frame length in every received frame, so the out-of-bounds read is triggered on demand with no race, no timing dependency, and no reliance on memory layout the attacker cannot influence.\nPR:N - The rx path runs in softirq/workqueue context on every received URB with no authentication, no capability check, and no local account on the target; USB/link-level peers are entirely untrusted and ungated.\nUI:N - The driver binds automatically via MODULE_DEVICE_TABLE and processes frames in usbnet_bh without any user action; on an already-connected host-to-host cable the victim does nothing at all.\nS:U - The out-of-bounds read stays within the kernel's own memory and security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The attacker controls the read offset across a ~32 KB range past a 1523-byte slab/page-frag object, and the comparison outcome is leaked back over the wire because only the matching path reaches nc_ensure_sync()'s vendor control transfer, yielding a repeatable oracle for probing kernel heap contents rather than a bounded few-byte read.\nI:N - The path performs only a one-byte read; the subsequent skb->len != packet_len check still rejects the frame, and the skb_trim calls on the underflow paths are no-ops, so no kernel memory or network data is modified.\nA:H - The read reaches roughly 31 KB beyond the allocation, which can cross into a KFENCE guard page, an unmapped hole, or a page-frag boundary and oops in softirq context, and on KASAN/panic_on_warn hardened kernels it panics the machine outright — repeatable per frame."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:57:24.361Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-64547","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T15:42:20.565927Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T20:48:40.168Z"}}]}}}