{"id":"CVE-2025-21764","revision":null,"records":[{"revision":"51662d2d8c914497a39209b6bc17f392","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21764","aliases":[],"title":"ndisc: use RCU protection in ndisc_alloc_skb()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nndisc: use RCU protection in ndisc_alloc_skb()\n\nndisc_alloc_skb() can be called without RTNL or RCU being held.\n\nAdd RCU protection to avoid possible UAF.","state":0,"publishedAt":"2025-02-27T02:18:15.598+00:00","modifiedAt":"2026-10-15T01:04:11.375+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/ipv6/ndisc.c\"\n ],\n \"versions\": [\n {\n \"version\": \"de09334b9326632bbf1a74bfd8b01866cbbf2f61\",\n \"lessThan\": \"96fc896d0e5b37c12808df797397fb16f3080879\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"de09334b9326632bbf1a74bfd8b01866cbbf2f61\",\n \"lessThan\": \"c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"de09334b9326632bbf1a74bfd8b01866cbbf2f61\",\n \"lessThan\": \"b870256dd2a5648d5ed2f22316b3ac29a7e5ed63\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"de09334b9326632bbf1a74bfd8b01866cbbf2f61\",\n \"lessThan\": \"3c2d705f5adf5d860aaef90cb4211c0fde2ba66d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"de09334b9326632bbf1a74bfd8b01866cbbf2f61\",\n \"lessThan\": \"9e0ec817eb41a55327a46cd3ce331a9868d60304\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"de09334b9326632bbf1a74bfd8b01866cbbf2f61\",\n \"lessThan\": \"bbec88e4108e8d6fb468d3817fa652140a44ff28\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"de09334b9326632bbf1a74bfd8b01866cbbf2f61\",\n \"lessThan\": \"cd1065f92eb7ff21b9ba5308a86f33d1670bf926\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"de09334b9326632bbf1a74bfd8b01866cbbf2f61\",\n \"lessThan\": \"628e6d18930bbd21f2d4562228afe27694f66da9\",\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/ipv6/ndisc.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.9\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.9\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.291\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.235\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.179\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.129\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.79\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.16\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.13.4\",\n \"lessThanOrEqual\": \"6.13.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.14\",\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/96fc896d0e5b37c12808df797397fb16f3080879","https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1","https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63","https://git.kernel.org/stable/c/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d","https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304","https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28","https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926","https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21764","license":"CVE Program Terms of 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