{"id":"CVE-2025-21764","summary":"ndisc: use RCU protection in ndisc_alloc_skb()","details":"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.","modified":"2026-04-02T12:45:12.454299Z","published":"2025-02-27T02:18:15.598Z","related":["ALSA-2025:8333","ALSA-2025:9580","ALSA-2025:9581","SUSE-SU-2025:01600-1","SUSE-SU-2025:01919-1","SUSE-SU-2025:01951-1","SUSE-SU-2025:01967-1","SUSE-SU-2025:1177-1","SUSE-SU-2025:1178-1","SUSE-SU-2025:1180-1","SUSE-SU-2025:20190-1","SUSE-SU-2025:20192-1","SUSE-SU-2025:20260-1","SUSE-SU-2025:20270-1","SUSE-SU-2026:0474-1","SUSE-SU-2026:0475-1","SUSE-SU-2026:0495-1","SUSE-SU-2026:0496-1","SUSE-SU-2026:0617-1","SUSE-SU-2026:1131-1","USN-7521-2"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21764.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/96fc896d0e5b37c12808df797397fb16f3080879"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21764.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21764"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"de09334b9326632bbf1a74bfd8b01866cbbf2f61"},{"fixed":"96fc896d0e5b37c12808df797397fb16f3080879"},{"fixed":"c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1"},{"fixed":"b870256dd2a5648d5ed2f22316b3ac29a7e5ed63"},{"fixed":"3c2d705f5adf5d860aaef90cb4211c0fde2ba66d"},{"fixed":"9e0ec817eb41a55327a46cd3ce331a9868d60304"},{"fixed":"bbec88e4108e8d6fb468d3817fa652140a44ff28"},{"fixed":"cd1065f92eb7ff21b9ba5308a86f33d1670bf926"},{"fixed":"628e6d18930bbd21f2d4562228afe27694f66da9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21764.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}