{"api_version":"1","generated_at":"2026-06-14T18:36:22+00:00","cve":"CVE-2026-46323","urls":{"html":"https://cve.report/CVE-2026-46323","api":"https://cve.report/api/cve/CVE-2026-46323.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46323","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46323"},"summary":{"title":"net: gro: don't merge zcopy skbs","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gro: don't merge zcopy skbs\n\nskb_gro_receive() can currently copy frags between the source and GRO\nskb, without checking the zerocopy status, and in particular the\nSKBFL_MANAGED_FRAG_REFS flag.\n\nWhen SKBFL_MANAGED_FRAG_REFS is set, the skb doesn't hold a reference\non the pages in shinfo->frags. Appending those frags to another skb's\nfrags without fixing up the page refcount can lead to UAF.\n\nWhen either the last skb in the GRO chain (the one we would append\nfrags to) or the source skb is zerocopy, don't merge the skbs.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-09 13:16:37","updated_at":"2026-06-14 06:16:24"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/1f9c828556416fbe3f49386708ce999fc4d4da06","name":"https://git.kernel.org/stable/c/1f9c828556416fbe3f49386708ce999fc4d4da06","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e334cbf3388fd9334503a778a82d9e9f14dd2f71","name":"https://git.kernel.org/stable/c/e334cbf3388fd9334503a778a82d9e9f14dd2f71","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/479084ae0e1d9cb7929cb4298d35623de189f80a","name":"https://git.kernel.org/stable/c/479084ae0e1d9cb7929cb4298d35623de189f80a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4db79a322db8c97f7b73b8a347395ef4d685eb40","name":"https://git.kernel.org/stable/c/4db79a322db8c97f7b73b8a347395ef4d685eb40","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/44bea2032af0425e4ce6d26a8af0ede79db49ec1","name":"https://git.kernel.org/stable/c/44bea2032af0425e4ce6d26a8af0ede79db49ec1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46323","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46323","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 753f1ca4e1e50248a1b760c9774d6d6b354562cc 1f9c828556416fbe3f49386708ce999fc4d4da06 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 753f1ca4e1e50248a1b760c9774d6d6b354562cc 479084ae0e1d9cb7929cb4298d35623de189f80a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 753f1ca4e1e50248a1b760c9774d6d6b354562cc e334cbf3388fd9334503a778a82d9e9f14dd2f71 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 753f1ca4e1e50248a1b760c9774d6d6b354562cc 44bea2032af0425e4ce6d26a8af0ede79db49ec1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nnet: gro: don't merge zcopy skbs\n\nskb_gro_receive() can currently copy frags between the source and GRO\nskb, without checking the zerocopy status, and in particular the\nSKBFL_MANAGED_FRAG_REFS flag.\n\nWhen SKBFL_MANAGED_FRAG_REFS is set, the skb doesn't hold a reference\non the pages in shinfo->frags. Appending those frags to another skb's\nfrags without fixing up the page refcount can lead to UAF.\n\nWhen either the last skb in the GRO chain (the one we would append\nfrags to) or the source skb is zerocopy, don't merge the skbs."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-06-14T04:30:18.858Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/1f9c828556416fbe3f49386708ce999fc4d4da06"},{"url":"https://git.kernel.org/stable/c/479084ae0e1d9cb7929cb4298d35623de189f80a"},{"url":"https://git.kernel.org/stable/c/e334cbf3388fd9334503a778a82d9e9f14dd2f71"},{"url":"https://git.kernel.org/stable/c/44bea2032af0425e4ce6d26a8af0ede79db49ec1"},{"url":"https://git.kernel.org/stable/c/4db79a322db8c97f7b73b8a347395ef4d685eb40"}],"title":"net: gro: don't merge zcopy skbs","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46323","datePublished":"2026-06-09T12:11:15.562Z","dateReserved":"2026-05-13T15:03:33.112Z","dateUpdated":"2026-06-14T04:30:18.858Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-09 13:16:37","lastModifiedDate":"2026-06-14 06:16:24","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46323","Ordinal":"1","Title":"net: gro: don't merge zcopy skbs","CVE":"CVE-2026-46323","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46323","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gro: don't merge zcopy skbs\n\nskb_gro_receive() can currently copy frags between the source and GRO\nskb, without checking the zerocopy status, and in particular the\nSKBFL_MANAGED_FRAG_REFS flag.\n\nWhen SKBFL_MANAGED_FRAG_REFS is set, the skb doesn't hold a reference\non the pages in shinfo->frags. Appending those frags to another skb's\nfrags without fixing up the page refcount can lead to UAF.\n\nWhen either the last skb in the GRO chain (the one we would append\nfrags to) or the source skb is zerocopy, don't merge the skbs.","Type":"Description","Title":"net: gro: don't merge zcopy skbs"}]}}}