{"api_version":"1","generated_at":"2026-04-23T02:25:15+00:00","cve":"CVE-2026-23448","urls":{"html":"https://cve.report/CVE-2026-23448","api":"https://cve.report/api/cve/CVE-2026-23448.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23448","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23448"},"summary":{"title":"net: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check\n\ncdc_ncm_rx_verify_ndp16() validates that the NDP header and its DPE\nentries fit within the skb. The first check correctly accounts for\nndpoffset:\n\n  if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len)\n\nbut the second check omits it:\n\n  if ((sizeof(struct usb_cdc_ncm_ndp16) +\n       ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len)\n\nThis validates the DPE array size against the total skb length as if\nthe NDP were at offset 0, rather than at ndpoffset. When the NDP is\nplaced near the end of the NTB (large wNdpIndex), the DPE entries can\nextend past the skb data buffer even though the check passes.\ncdc_ncm_rx_fixup() then reads out-of-bounds memory when iterating\nthe DPE array.\n\nAdd ndpoffset to the nframes bounds check and use struct_size_t() to\nexpress the NDP-plus-DPE-array size more clearly.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-03 16:16:30","updated_at":"2026-04-07 13:21:09"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/2aa8a4fa8d5b7d0e1ebcec100e1a4d80a1f4b21a","name":"https://git.kernel.org/stable/c/2aa8a4fa8d5b7d0e1ebcec100e1a4d80a1f4b21a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/403f94ddcb36c552fbef51dea735b131e3dcde8b","name":"https://git.kernel.org/stable/c/403f94ddcb36c552fbef51dea735b131e3dcde8b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/789204f980730258c983102c027c375238009c80","name":"https://git.kernel.org/stable/c/789204f980730258c983102c027c375238009c80","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dce9dda0e3707e887977db44407989e9ead26611","name":"https://git.kernel.org/stable/c/dce9dda0e3707e887977db44407989e9ead26611","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f1c7701d3ac91b62d672c13690cf295821f0d5c3","name":"https://git.kernel.org/stable/c/f1c7701d3ac91b62d672c13690cf295821f0d5c3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23448","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23448","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff06ab13a4ccae4acb44a2d4e3ece367b616ab50 f1c7701d3ac91b62d672c13690cf295821f0d5c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff06ab13a4ccae4acb44a2d4e3ece367b616ab50 789204f980730258c983102c027c375238009c80 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff06ab13a4ccae4acb44a2d4e3ece367b616ab50 403f94ddcb36c552fbef51dea735b131e3dcde8b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff06ab13a4ccae4acb44a2d4e3ece367b616ab50 dce9dda0e3707e887977db44407989e9ead26611 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff06ab13a4ccae4acb44a2d4e3ece367b616ab50 2aa8a4fa8d5b7d0e1ebcec100e1a4d80a1f4b21a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.130 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.78 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.20 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.10 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"23448","cve":"CVE-2026-23448","epss":"0.000180000","percentile":"0.046140000","score_date":"2026-04-07","updated_at":"2026-04-08 00:03:39"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/usb/cdc_ncm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f1c7701d3ac91b62d672c13690cf295821f0d5c3","status":"affected","version":"ff06ab13a4ccae4acb44a2d4e3ece367b616ab50","versionType":"git"},{"lessThan":"789204f980730258c983102c027c375238009c80","status":"affected","version":"ff06ab13a4ccae4acb44a2d4e3ece367b616ab50","versionType":"git"},{"lessThan":"403f94ddcb36c552fbef51dea735b131e3dcde8b","status":"affected","version":"ff06ab13a4ccae4acb44a2d4e3ece367b616ab50","versionType":"git"},{"lessThan":"dce9dda0e3707e887977db44407989e9ead26611","status":"affected","version":"ff06ab13a4ccae4acb44a2d4e3ece367b616ab50","versionType":"git"},{"lessThan":"2aa8a4fa8d5b7d0e1ebcec100e1a4d80a1f4b21a","status":"affected","version":"ff06ab13a4ccae4acb44a2d4e3ece367b616ab50","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/usb/cdc_ncm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.8"},{"lessThan":"3.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0-rc5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.78","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.20","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.10","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0-rc5","versionStartIncluding":"3.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check\n\ncdc_ncm_rx_verify_ndp16() validates that the NDP header and its DPE\nentries fit within the skb. The first check correctly accounts for\nndpoffset:\n\n  if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len)\n\nbut the second check omits it:\n\n  if ((sizeof(struct usb_cdc_ncm_ndp16) +\n       ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len)\n\nThis validates the DPE array size against the total skb length as if\nthe NDP were at offset 0, rather than at ndpoffset. When the NDP is\nplaced near the end of the NTB (large wNdpIndex), the DPE entries can\nextend past the skb data buffer even though the check passes.\ncdc_ncm_rx_fixup() then reads out-of-bounds memory when iterating\nthe DPE array.\n\nAdd ndpoffset to the nframes bounds check and use struct_size_t() to\nexpress the NDP-plus-DPE-array size more clearly."}],"providerMetadata":{"dateUpdated":"2026-04-03T15:15:31.488Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f1c7701d3ac91b62d672c13690cf295821f0d5c3"},{"url":"https://git.kernel.org/stable/c/789204f980730258c983102c027c375238009c80"},{"url":"https://git.kernel.org/stable/c/403f94ddcb36c552fbef51dea735b131e3dcde8b"},{"url":"https://git.kernel.org/stable/c/dce9dda0e3707e887977db44407989e9ead26611"},{"url":"https://git.kernel.org/stable/c/2aa8a4fa8d5b7d0e1ebcec100e1a4d80a1f4b21a"}],"title":"net: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23448","datePublished":"2026-04-03T15:15:31.488Z","dateReserved":"2026-01-13T15:37:46.020Z","dateUpdated":"2026-04-03T15:15:31.488Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-03 16:16:30","lastModifiedDate":"2026-04-07 13:21:09","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23448","Ordinal":"1","Title":"net: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check","CVE":"CVE-2026-23448","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23448","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check\n\ncdc_ncm_rx_verify_ndp16() validates that the NDP header and its DPE\nentries fit within the skb. The first check correctly accounts for\nndpoffset:\n\n  if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len)\n\nbut the second check omits it:\n\n  if ((sizeof(struct usb_cdc_ncm_ndp16) +\n       ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len)\n\nThis validates the DPE array size against the total skb length as if\nthe NDP were at offset 0, rather than at ndpoffset. When the NDP is\nplaced near the end of the NTB (large wNdpIndex), the DPE entries can\nextend past the skb data buffer even though the check passes.\ncdc_ncm_rx_fixup() then reads out-of-bounds memory when iterating\nthe DPE array.\n\nAdd ndpoffset to the nframes bounds check and use struct_size_t() to\nexpress the NDP-plus-DPE-array size more clearly.","Type":"Description","Title":"net: usb: cdc_ncm: add ndpoffset to NDP16 nframes bounds check"}]}}}