{"id":"CVE-2026-52981","revision":"11dfef90c2984401b45fcdca6302af2b","records":[{"revision":"11dfef90c2984401b45fcdca6302af2b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-52981","aliases":[],"title":"neigh: let neigh_xmit take skb ownership","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nneigh: let neigh_xmit take skb ownership\n\nneigh_xmit always releases the skb, except when no neighbour table is\nfound. But even the first added user of neigh_xmit (mpls) relied on\nneigh_xmit to release the skb (or queue it for tx).\n\nsashiko reported:\n If neigh_xmit() is called with an uninitialized neighbor table (for\n example, NEIGH_ND_TABLE when IPv6 is disabled), it returns -EAFNOSUPPORT\n and bypasses its internal out_kfree_skb error path.  Because the return\n value of neigh_xmit() is ignored here, does this leak the SKB?\n\nAssume full ownership and remove the last code path that doesn't\nxmit or free skb.","state":0,"publishedAt":"2026-06-24T16:28:57.074+00:00","modifiedAt":"2026-10-19T19:47:11.784+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/neighbour.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\",\n                            \"lessThan\": \"8a89054a1ec0767aec25ed2bbac933da6ba3cf5a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\",\n                            \"lessThan\": \"9247d59ca15bf60a57dca08103f055d8a4340877\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\",\n                            \"lessThan\": \"0084712e0bee204b284510cdb63182fd5a30c2b7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\",\n                            \"lessThan\": \"63063ba60d2dc334e34f1e3f9271d7f3f6f30307\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\",\n                            \"lessThan\": \"445e45a2c3a078316a62d2d331a570cf34ef5079\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\",\n                            \"lessThan\": \"4438113be604ee67a7bf4f81da6e1cca41332ce4\",\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/neighbour.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.141\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.91\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.33\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.10\",\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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/8a89054a1ec0767aec25ed2bbac933da6ba3cf5a","https://git.kernel.org/stable/c/9247d59ca15bf60a57dca08103f055d8a4340877","https://git.kernel.org/stable/c/0084712e0bee204b284510cdb63182fd5a30c2b7","https://git.kernel.org/stable/c/63063ba60d2dc334e34f1e3f9271d7f3f6f30307","https://git.kernel.org/stable/c/445e45a2c3a078316a62d2d331a570cf34ef5079","https://git.kernel.org/stable/c/4438113be604ee67a7bf4f81da6e1cca41332ce4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-52981","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-52981","identifiers":["CVE-2026-52981"]},"retained":false,"historicalAffected":[]}],"coverage":[]}