{"api_version":"1","generated_at":"2026-08-22T17:47:26+00:00","cve":"CVE-2026-74695","urls":{"html":"https://cve.report/CVE-2026-74695","api":"https://cve.report/api/cve/CVE-2026-74695.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74695","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74695"},"summary":{"title":"netfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()\n\nIncoming skbs passing through netfilter flowtable offload hooks (or XFRM\noffload path) might already carry a ref-counted dst_entry assigned during\nearlier RX or routing steps.\n\nCalling skb_dst_set_noref() when skb already holds a ref-counted dst\noverwrites skb->_skb_refdst, leaking the previous dst_entry reference\ncount and triggering a DEBUG_NET_WARN_ON_ONCE assertion in\nskb_dst_check_unset():\n\n  WARNING: at skb_dst_check_unset include/linux/skbuff.h:1170\n  WARNING: at skb_dst_set_noref include/linux/skbuff.h:1234\n  WARNING: at nf_flow_offload_ip_hook+0xf6c/0x2b60 net/netfilter/nf_flow_table_ip.c:864\n\nDrop any existing dst_entry reference with skb_dst_drop(skb) before\nsetting the non-referenced flowtable destination.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:44","updated_at":"2026-08-22 16:16:44"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/538e67e8c7889cf5f93951f5309d1bcb41f86036","name":"https://git.kernel.org/stable/c/538e67e8c7889cf5f93951f5309d1bcb41f86036","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8aecf0bbcc72605592134c917c222207d8f63ab0","name":"https://git.kernel.org/stable/c/8aecf0bbcc72605592134c917c222207d8f63ab0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/12afa450a6a6c0cce2c42b7545a9958f62d8a00c","name":"https://git.kernel.org/stable/c/12afa450a6a6c0cce2c42b7545a9958f62d8a00c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74695","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74695","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 12afa450a6a6c0cce2c42b7545a9958f62d8a00c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 538e67e8c7889cf5f93951f5309d1bcb41f86036 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 8aecf0bbcc72605592134c917c222207d8f63ab0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b4b1adf2e66ecc7125c4117e7aad9ff61e2cfd27 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 209dedf806d31095968f54323dbe62525b077b33 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.16.15 4.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.17.1 4.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * 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/netfilter/nf_flow_table_ip.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"12afa450a6a6c0cce2c42b7545a9958f62d8a00c","status":"affected","version":"2a79fd3908acd88e6cb0e620c314d7b1fee56a02","versionType":"git"},{"lessThan":"538e67e8c7889cf5f93951f5309d1bcb41f86036","status":"affected","version":"2a79fd3908acd88e6cb0e620c314d7b1fee56a02","versionType":"git"},{"lessThan":"8aecf0bbcc72605592134c917c222207d8f63ab0","status":"affected","version":"2a79fd3908acd88e6cb0e620c314d7b1fee56a02","versionType":"git"},{"status":"affected","version":"b4b1adf2e66ecc7125c4117e7aad9ff61e2cfd27","versionType":"git"},{"status":"affected","version":"209dedf806d31095968f54323dbe62525b077b33","versionType":"git"},{"lessThan":"4.17","status":"affected","version":"4.16.15","versionType":"semver"},{"lessThan":"4.18","status":"affected","version":"4.17.1","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nf_flow_table_ip.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.18"},{"lessThan":"4.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"4.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"4.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"4.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()\n\nIncoming skbs passing through netfilter flowtable offload hooks (or XFRM\noffload path) might already carry a ref-counted dst_entry assigned during\nearlier RX or routing steps.\n\nCalling skb_dst_set_noref() when skb already holds a ref-counted dst\noverwrites skb->_skb_refdst, leaking the previous dst_entry reference\ncount and triggering a DEBUG_NET_WARN_ON_ONCE assertion in\nskb_dst_check_unset():\n\n  WARNING: at skb_dst_check_unset include/linux/skbuff.h:1170\n  WARNING: at skb_dst_set_noref include/linux/skbuff.h:1234\n  WARNING: at nf_flow_offload_ip_hook+0xf6c/0x2b60 net/netfilter/nf_flow_table_ip.c:864\n\nDrop any existing dst_entry reference with skb_dst_drop(skb) before\nsetting the non-referenced flowtable destination."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:32:57.756Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/12afa450a6a6c0cce2c42b7545a9958f62d8a00c"},{"url":"https://git.kernel.org/stable/c/538e67e8c7889cf5f93951f5309d1bcb41f86036"},{"url":"https://git.kernel.org/stable/c/8aecf0bbcc72605592134c917c222207d8f63ab0"}],"title":"netfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74695","datePublished":"2026-08-22T15:32:57.756Z","dateReserved":"2026-08-15T05:44:03.926Z","dateUpdated":"2026-08-22T15:32:57.756Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:44","lastModifiedDate":"2026-08-22 16:16:44","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74695","Ordinal":"1","Title":"netfilter: nf_flow_table: drop existing skb dst before skb_dst_s","CVE":"CVE-2026-74695","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74695","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()\n\nIncoming skbs passing through netfilter flowtable offload hooks (or XFRM\noffload path) might already carry a ref-counted dst_entry assigned during\nearlier RX or routing steps.\n\nCalling skb_dst_set_noref() when skb already holds a ref-counted dst\noverwrites skb->_skb_refdst, leaking the previous dst_entry reference\ncount and triggering a DEBUG_NET_WARN_ON_ONCE assertion in\nskb_dst_check_unset():\n\n  WARNING: at skb_dst_check_unset include/linux/skbuff.h:1170\n  WARNING: at skb_dst_set_noref include/linux/skbuff.h:1234\n  WARNING: at nf_flow_offload_ip_hook+0xf6c/0x2b60 net/netfilter/nf_flow_table_ip.c:864\n\nDrop any existing dst_entry reference with skb_dst_drop(skb) before\nsetting the non-referenced flowtable destination.","Type":"Description","Title":"netfilter: nf_flow_table: drop existing skb dst before skb_dst_s"}]}}}