{"id":"CVE-2026-23412","revision":"458cd635c3044bfe9919709578e0e379","records":[{"revision":"458cd635c3044bfe9919709578e0e379","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23412","aliases":[],"title":"netfilter: bpf: defer hook memory release until rcu readers are done","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: bpf: defer hook memory release until rcu readers are done\n\nYiming Qian reports UaF when concurrent process is dumping hooks via\nnfnetlink_hooks:\n\nBUG: KASAN: slab-use-after-free in nfnl_hook_dump_one.isra.0+0xe71/0x10f0\nRead of size 8 at addr ffff888003edbf88 by task poc/79\nCall Trace:\n <TASK>\n nfnl_hook_dump_one.isra.0+0xe71/0x10f0\n netlink_dump+0x554/0x12b0\n nfnl_hook_get+0x176/0x230\n [..]\n\nDefer release until after concurrent readers have completed.","state":0,"publishedAt":"2026-04-02T11:40:53.528+00:00","modifiedAt":"2026-10-19T18:35:42.715+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/netfilter/nf_bpf_link.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"84601d6ee68ae820dec97450934797046d62db4b\",\n                            \"lessThan\": \"d016c216bc75c45128160593a77b864a04dbe7c0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84601d6ee68ae820dec97450934797046d62db4b\",\n                            \"lessThan\": \"cb2bf5efdb02a2a59faf603604a1066e8266f349\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84601d6ee68ae820dec97450934797046d62db4b\",\n                            \"lessThan\": \"c25e0dec366ae99b7264324ce3c7cbaea34691f9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84601d6ee68ae820dec97450934797046d62db4b\",\n                            \"lessThan\": \"54244d54a971c26a0cd0a9073460ff71f3c51b32\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84601d6ee68ae820dec97450934797046d62db4b\",\n                            \"lessThan\": \"24f90fa3994b992d1a09003a3db2599330a5232a\",\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/netfilter/nf_bpf_link.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.130\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.78\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.20\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.10\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\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/d016c216bc75c45128160593a77b864a04dbe7c0","https://git.kernel.org/stable/c/cb2bf5efdb02a2a59faf603604a1066e8266f349","https://git.kernel.org/stable/c/c25e0dec366ae99b7264324ce3c7cbaea34691f9","https://git.kernel.org/stable/c/54244d54a971c26a0cd0a9073460ff71f3c51b32","https://git.kernel.org/stable/c/24f90fa3994b992d1a09003a3db2599330a5232a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23412","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23412","identifiers":["CVE-2026-23412"]},"retained":false,"historicalAffected":[]}],"coverage":[]}