{"id":"CVE-2026-46323","revision":"467b9a02ddf94d7fbe41ead31fa3a72c","records":[{"revision":"467b9a02ddf94d7fbe41ead31fa3a72c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46323","aliases":[],"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":0,"publishedAt":"2026-06-09T12:11:15.562+00:00","modifiedAt":"2026-10-19T19:36:58.47+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/gro.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"753f1ca4e1e50248a1b760c9774d6d6b354562cc\",\n                            \"lessThan\": \"3c6cc9f2ca65b6dd61b1af75452dc0e1cd0aad8d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"753f1ca4e1e50248a1b760c9774d6d6b354562cc\",\n                            \"lessThan\": \"1f9c828556416fbe3f49386708ce999fc4d4da06\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"753f1ca4e1e50248a1b760c9774d6d6b354562cc\",\n                            \"lessThan\": \"479084ae0e1d9cb7929cb4298d35623de189f80a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"753f1ca4e1e50248a1b760c9774d6d6b354562cc\",\n                            \"lessThan\": \"e334cbf3388fd9334503a778a82d9e9f14dd2f71\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"753f1ca4e1e50248a1b760c9774d6d6b354562cc\",\n                            \"lessThan\": \"44bea2032af0425e4ce6d26a8af0ede79db49ec1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"753f1ca4e1e50248a1b760c9774d6d6b354562cc\",\n                            \"lessThan\": \"4db79a322db8c97f7b73b8a347395ef4d685eb40\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/gro.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.176\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.142\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.92\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.34\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.11\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/3c6cc9f2ca65b6dd61b1af75452dc0e1cd0aad8d","https://git.kernel.org/stable/c/1f9c828556416fbe3f49386708ce999fc4d4da06","https://git.kernel.org/stable/c/479084ae0e1d9cb7929cb4298d35623de189f80a","https://git.kernel.org/stable/c/e334cbf3388fd9334503a778a82d9e9f14dd2f71","https://git.kernel.org/stable/c/44bea2032af0425e4ce6d26a8af0ede79db49ec1","https://git.kernel.org/stable/c/4db79a322db8c97f7b73b8a347395ef4d685eb40"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46323","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46323","identifiers":["CVE-2026-46323"]},"retained":false,"historicalAffected":[]}],"coverage":[]}