{"id":"CVE-2025-68263","revision":"15ec55e929db4c9bbcdae6722109b7d1","records":[{"revision":"15ec55e929db4c9bbcdae6722109b7d1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-68263","aliases":[],"title":"ksmbd: ipc: fix use-after-free in ipc_msg_send_request","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: ipc: fix use-after-free in ipc_msg_send_request\n\nipc_msg_send_request() waits for a generic netlink reply using an\nipc_msg_table_entry on the stack. The generic netlink handler\n(handle_generic_event()/handle_response()) fills entry->response under\nipc_msg_table_lock, but ipc_msg_send_request() used to validate and free\nentry->response without holding the same lock.\n\nUnder high concurrency this allows a race where handle_response() is\ncopying data into entry->response while ipc_msg_send_request() has just\nfreed it, leading to a slab-use-after-free reported by KASAN in\nhandle_generic_event():\n\n  BUG: KASAN: slab-use-after-free in handle_generic_event+0x3c4/0x5f0 [ksmbd]\n  Write of size 12 at addr ffff888198ee6e20 by task pool/109349\n  ...\n  Freed by task:\n    kvfree\n    ipc_msg_send_request [ksmbd]\n    ksmbd_rpc_open -> ksmbd_session_rpc_open [ksmbd]\n\nFix by:\n- Taking ipc_msg_table_lock in ipc_msg_send_request() while validating\n  entry->response, freeing it when invalid, and removing the entry from\n  ipc_msg_table.\n- Returning the final entry->response pointer to the caller only after\n  the hash entry is removed under the lock.\n- Returning NULL in the error path, preserving the original API\n  semantics.\n\nThis makes all accesses to entry->response consistent with\nhandle_response(), which already updates and fills the response buffer\nunder ipc_msg_table_lock, and closes the race that allowed the UAF.","state":0,"publishedAt":"2025-12-16T14:45:05.218+00:00","modifiedAt":"2026-10-15T22:02:48.374+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                        \"fs/smb/server/transport_ipc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0626e6641f6b467447c81dd7678a69c66f7746cf\",\n                            \"lessThan\": \"de85fb58f9967ba024bb08e0041613d37b57b4d1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0626e6641f6b467447c81dd7678a69c66f7746cf\",\n                            \"lessThan\": \"708a620b471a14466f1f52c90bf3f65ebdb31460\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0626e6641f6b467447c81dd7678a69c66f7746cf\",\n                            \"lessThan\": \"5ac763713a1ef8f9a8bda1dbd81f0318d67baa4e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0626e6641f6b467447c81dd7678a69c66f7746cf\",\n                            \"lessThan\": \"759c8c30cfa8706c518e56f67971b1f0932f4b9b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0626e6641f6b467447c81dd7678a69c66f7746cf\",\n                            \"lessThan\": \"8229c6ca50cea701e25a7ee25f48441b582ec5fa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0626e6641f6b467447c81dd7678a69c66f7746cf\",\n                            \"lessThan\": \"1fab1fa091f5aa97265648b53ea031deedd26235\",\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                        \"fs/smb/server/transport_ipc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.160\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.120\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.62\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.17.12\",\n                            \"lessThanOrEqual\": \"6.17.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.1\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/de85fb58f9967ba024bb08e0041613d37b57b4d1","https://git.kernel.org/stable/c/708a620b471a14466f1f52c90bf3f65ebdb31460","https://git.kernel.org/stable/c/5ac763713a1ef8f9a8bda1dbd81f0318d67baa4e","https://git.kernel.org/stable/c/759c8c30cfa8706c518e56f67971b1f0932f4b9b","https://git.kernel.org/stable/c/8229c6ca50cea701e25a7ee25f48441b582ec5fa","https://git.kernel.org/stable/c/1fab1fa091f5aa97265648b53ea031deedd26235"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-68263","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-68263","identifiers":["CVE-2025-68263"]},"retained":false,"historicalAffected":[]}],"coverage":[]}