{"id":"CVE-2026-89548","revision":"3e0005efcf574e7bb8d65f8440135030","records":[{"revision":"3e0005efcf574e7bb8d65f8440135030","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89548","aliases":[],"title":"SUNRPC: always drain cache_cleaner before destroying a cache_detail","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: always drain cache_cleaner before destroying a cache_detail\n\nsunrpc_destroy_cache_detail() only cancels the global cache_cleaner\ndelayed_work when cache_list is empty.  During per-netns teardown\ncache_list is never empty because init_net's caches remain registered,\nso the cancel never fires.  After unlink, the caller proceeds to\ncache_destroy_net() which kfrees the cache_detail while cache_clean()\nmay still hold a dangling pointer to it.  The result is a\nuse-after-free: cache_dequeue() takes cd->queue_lock on freed memory,\nand cache_put() dereferences cd->cache_put as a function pointer from\nfreed slab.\n\nDrop the list_empty guard so that cancel_delayed_work_sync() always\nruns, ensuring any in-flight cache_clean() completes before the\ncache_detail is freed.  Re-arm the cleaner afterwards if other caches\nare still registered.","state":0,"publishedAt":"2026-09-11T19:44:23.298+00:00","modifiedAt":"2026-10-19T08:48:41.057+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/sunrpc/cache.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"820f9442e711a81749e70c40f149fc54c4ce0ca8\",\n                            \"lessThan\": \"dec787a15c96a5665e9ffc61b429a6a4ab26e6b9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"820f9442e711a81749e70c40f149fc54c4ce0ca8\",\n                            \"lessThan\": \"5eea874a696201c31e7c2d7badbfa0d90e9961b5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"820f9442e711a81749e70c40f149fc54c4ce0ca8\",\n                            \"lessThan\": \"cf239de7fdcc8336259b01ea4bcf650dadad1040\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"820f9442e711a81749e70c40f149fc54c4ce0ca8\",\n                            \"lessThan\": \"6d74ecc2be120a0c300b224b7649fe93c0453714\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"820f9442e711a81749e70c40f149fc54c4ce0ca8\",\n                            \"lessThan\": \"9d44836f60c8c29bcdb1471fd9202387c642a890\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"820f9442e711a81749e70c40f149fc54c4ce0ca8\",\n                            \"lessThan\": \"2e861ce2aaa468351a6a47c4cbb4971ebb740c7b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"820f9442e711a81749e70c40f149fc54c4ce0ca8\",\n                            \"lessThan\": \"3d60fdf951143d6ef4e352e2f8eb852286701726\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"820f9442e711a81749e70c40f149fc54c4ce0ca8\",\n                            \"lessThan\": \"f42d0fda0c67695db6bc704b04b7c10240805377\",\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/sunrpc/cache.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\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/dec787a15c96a5665e9ffc61b429a6a4ab26e6b9","https://git.kernel.org/stable/c/5eea874a696201c31e7c2d7badbfa0d90e9961b5","https://git.kernel.org/stable/c/cf239de7fdcc8336259b01ea4bcf650dadad1040","https://git.kernel.org/stable/c/6d74ecc2be120a0c300b224b7649fe93c0453714","https://git.kernel.org/stable/c/9d44836f60c8c29bcdb1471fd9202387c642a890","https://git.kernel.org/stable/c/2e861ce2aaa468351a6a47c4cbb4971ebb740c7b","https://git.kernel.org/stable/c/3d60fdf951143d6ef4e352e2f8eb852286701726","https://git.kernel.org/stable/c/f42d0fda0c67695db6bc704b04b7c10240805377"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89548","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89548","identifiers":["CVE-2026-89548"]},"retained":false,"historicalAffected":[]}],"coverage":[]}