{"id":"CVE-2025-21758","summary":"ipv6: mcast: add RCU protection to mld_newpack()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: add RCU protection to mld_newpack()\n\nmld_newpack() can be called without RTNL or RCU being held.\n\nNote that we no longer can use sock_alloc_send_skb() because\nipv6.igmp_sk uses GFP_KERNEL allocations which can sleep.\n\nInstead use alloc_skb() and charge the net-\u003eipv6.igmp_sk\nsocket under RCU protection.","modified":"2026-05-07T04:16:56.987118Z","published":"2025-02-27T02:18:12.496Z","related":["SUSE-SU-2025:01600-1","SUSE-SU-2025:01614-1","SUSE-SU-2025:01707-1","SUSE-SU-2025:01919-1","SUSE-SU-2025:01951-1","SUSE-SU-2025:01964-1","SUSE-SU-2025:01967-1","SUSE-SU-2025:01972-1","SUSE-SU-2025:20343-1","SUSE-SU-2025:20344-1","SUSE-SU-2025:20354-1","SUSE-SU-2025:20355-1","USN-7521-2"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21758.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1b91c597b0214b1b462eb627ec02658c944623f2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/25195f9d5ffcc8079ad743a50c0409dbdc48d98a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/29fa42197f26a97cde29fa8c40beddf44ea5c8f3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a527750d877fd334de87eef81f1cb5f0f0ca3373"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d60d493b0e65647e0335e6a7c4547abcea7df8e9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e8af3632a7f2da83e27b083f787bced1faba00b1"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21758.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21758"},{"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":"b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551"},{"fixed":"29fa42197f26a97cde29fa8c40beddf44ea5c8f3"},{"fixed":"e8af3632a7f2da83e27b083f787bced1faba00b1"},{"fixed":"1b91c597b0214b1b462eb627ec02658c944623f2"},{"fixed":"25195f9d5ffcc8079ad743a50c0409dbdc48d98a"},{"fixed":"d60d493b0e65647e0335e6a7c4547abcea7df8e9"},{"fixed":"a527750d877fd334de87eef81f1cb5f0f0ca3373"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21758.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.26"},{"fixed":"5.15.179"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.129"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.79"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.13.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21758.json"}}],"schema_version":"1.7.5"}