{"api_version":"1","generated_at":"2026-08-13T12:30:17+00:00","cve":"CVE-2026-68288","urls":{"html":"https://cve.report/CVE-2026-68288","api":"https://cve.report/api/cve/CVE-2026-68288.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68288","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68288"},"summary":{"title":"net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() open code\nthe NET_DM_ATTR_PAYLOAD attribute to avoid zeroing the packet payload\nbefore overwriting it with skb_copy_bits().\n\nskb_put() reserves nla_total_size(payload_len), i.e. the header plus the\nNLA_ALIGN() padding, but only payload_len bytes are copied in. When\npayload_len is not a multiple of 4 the 1-3 padding bytes are never\ninitialized and are leaked to user space inside the netlink message.\n\nKMSAN confirms the leak for the software path when the packet payload\nlength is not 4-byte aligned:\n\n  BUG: KMSAN: kernel-infoleak in _copy_to_iter\n   _copy_to_iter\n   __skb_datagram_iter\n   skb_copy_datagram_iter\n   netlink_recvmsg\n   sock_recvmsg\n   __sys_recvfrom\n  Uninit was created at:\n   kmem_cache_alloc_node_noprof\n   __alloc_skb\n   net_dm_packet_work\n  Bytes 173-175 of 176 are uninitialized\n\nUse __nla_reserve(), which sets up the attribute header and zeroes the\npadding, instead of open coding the attribute construction.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:20:18","updated_at":"2026-08-10 13:20:18"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb","name":"https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b","name":"https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68288","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68288","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f 8fd6975d2aecc36b25ee82b6aef88e62a3527ccb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f 5e9c8baee0329fbefe7c67aea945e2a07f15e98b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/core/drop_monitor.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8fd6975d2aecc36b25ee82b6aef88e62a3527ccb","status":"affected","version":"ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f","versionType":"git"},{"lessThan":"5e9c8baee0329fbefe7c67aea945e2a07f15e98b","status":"affected","version":"ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/core/drop_monitor.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.4"},{"lessThan":"5.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc5","versionStartIncluding":"5.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() open code\nthe NET_DM_ATTR_PAYLOAD attribute to avoid zeroing the packet payload\nbefore overwriting it with skb_copy_bits().\n\nskb_put() reserves nla_total_size(payload_len), i.e. the header plus the\nNLA_ALIGN() padding, but only payload_len bytes are copied in. When\npayload_len is not a multiple of 4 the 1-3 padding bytes are never\ninitialized and are leaked to user space inside the netlink message.\n\nKMSAN confirms the leak for the software path when the packet payload\nlength is not 4-byte aligned:\n\n  BUG: KMSAN: kernel-infoleak in _copy_to_iter\n   _copy_to_iter\n   __skb_datagram_iter\n   skb_copy_datagram_iter\n   netlink_recvmsg\n   sock_recvmsg\n   __sys_recvfrom\n  Uninit was created at:\n   kmem_cache_alloc_node_noprof\n   __alloc_skb\n   net_dm_packet_work\n  Bytes 173-175 of 176 are uninitialized\n\nUse __nla_reserve(), which sets up the attribute header and zeroes the\npadding, instead of open coding the attribute construction."}],"providerMetadata":{"dateUpdated":"2026-08-10T12:02:21.097Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb"},{"url":"https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b"}],"title":"net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68288","datePublished":"2026-08-10T12:02:21.097Z","dateReserved":"2026-07-30T09:28:09.380Z","dateUpdated":"2026-08-10T12:02:21.097Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:20:18","lastModifiedDate":"2026-08-10 13:20:18","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68288","Ordinal":"1","Title":"net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD","CVE":"CVE-2026-68288","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68288","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() open code\nthe NET_DM_ATTR_PAYLOAD attribute to avoid zeroing the packet payload\nbefore overwriting it with skb_copy_bits().\n\nskb_put() reserves nla_total_size(payload_len), i.e. the header plus the\nNLA_ALIGN() padding, but only payload_len bytes are copied in. When\npayload_len is not a multiple of 4 the 1-3 padding bytes are never\ninitialized and are leaked to user space inside the netlink message.\n\nKMSAN confirms the leak for the software path when the packet payload\nlength is not 4-byte aligned:\n\n  BUG: KMSAN: kernel-infoleak in _copy_to_iter\n   _copy_to_iter\n   __skb_datagram_iter\n   skb_copy_datagram_iter\n   netlink_recvmsg\n   sock_recvmsg\n   __sys_recvfrom\n  Uninit was created at:\n   kmem_cache_alloc_node_noprof\n   __alloc_skb\n   net_dm_packet_work\n  Bytes 173-175 of 176 are uninitialized\n\nUse __nla_reserve(), which sets up the attribute header and zeroes the\npadding, instead of open coding the attribute construction.","Type":"Description","Title":"net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD"}]}}}