{"id":"CVE-2025-21758","revision":"c28fec0c030541b59f18082a931f5e25","records":[{"revision":"c28fec0c030541b59f18082a931f5e25","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21758","aliases":[],"title":"ipv6: mcast: add RCU protection to mld_newpack()","description":"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->ipv6.igmp_sk\nsocket under RCU protection.","state":0,"publishedAt":"2025-02-27T02:18:12.496+00:00","modifiedAt":"2026-10-15T01:04:02.341+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/mcast.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551\",\n                            \"lessThan\": \"29fa42197f26a97cde29fa8c40beddf44ea5c8f3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551\",\n                            \"lessThan\": \"e8af3632a7f2da83e27b083f787bced1faba00b1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551\",\n                            \"lessThan\": \"1b91c597b0214b1b462eb627ec02658c944623f2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551\",\n                            \"lessThan\": \"25195f9d5ffcc8079ad743a50c0409dbdc48d98a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551\",\n                            \"lessThan\": \"d60d493b0e65647e0335e6a7c4547abcea7df8e9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551\",\n                            \"lessThan\": \"a527750d877fd334de87eef81f1cb5f0f0ca3373\",\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/mcast.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.26\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.26\",\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/29fa42197f26a97cde29fa8c40beddf44ea5c8f3","https://git.kernel.org/stable/c/e8af3632a7f2da83e27b083f787bced1faba00b1","https://git.kernel.org/stable/c/1b91c597b0214b1b462eb627ec02658c944623f2","https://git.kernel.org/stable/c/25195f9d5ffcc8079ad743a50c0409dbdc48d98a","https://git.kernel.org/stable/c/d60d493b0e65647e0335e6a7c4547abcea7df8e9","https://git.kernel.org/stable/c/a527750d877fd334de87eef81f1cb5f0f0ca3373"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21758","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-21758","identifiers":["CVE-2025-21758"]},"retained":false,"historicalAffected":[]}],"coverage":[]}