{"id":"CVE-2026-98821","revision":"0069b91d0ac44990a11d6c8e78468c70","records":[{"revision":"0069b91d0ac44990a11d6c8e78468c70","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98821","aliases":[],"title":"block: reject polled dio with user integrity metadata","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: reject polled dio with user integrity metadata\n\nIOCB_HAS_METADATA leaves iocb->private as a uio_meta, while\niocb_bio_iopoll() expects a bio. Since 2729a60bbfb9, metadata I/O\nalways uses __blkdev_direct_IO(), which never publishes the bio for\npolling, so IOPOLL calls bio_poll() on the uio_meta.\n\nReproducer: io_uring IOPOLL plus a PI attribute on an integrity device\n(scsi_debug dif=1 dix=1). KASAN reports:\n\n  Oops: general protection fault, probably for non-canonical\n  address 0xdffffc0000000004\n  KASAN: null-ptr-deref in range\n  [0x0000000000000020-0x0000000000000027]\n  RIP: 0010:bio_poll+0x9d/0x4b0\n  Call Trace:\n   iocb_bio_iopoll+0x5b/0x80\n   io_uring_classic_poll+0xf3/0x140\n   io_do_iopoll+0x4e3/0xc00\n   io_iopoll_check+0x275/0x560\n   __do_sys_io_uring_enter+0x2e5/0x720\n\nReturn -EOPNOTSUPP when HIPRI is combined with user metadata.","state":0,"publishedAt":"2026-10-18T15:49:13.154+00:00","modifiedAt":"2026-10-19T09:26:14.186+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                        \"block/fops.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2729a60bbfb9215997f25372ebe9b7964f038296\",\n                            \"lessThan\": \"c97ef13ad96be0e08af38dfa2ed40cded0b53e1b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2729a60bbfb9215997f25372ebe9b7964f038296\",\n                            \"lessThan\": \"dd33c03cefccdfcb223e9e6262643d64f8c1ae20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2729a60bbfb9215997f25372ebe9b7964f038296\",\n                            \"lessThan\": \"2a42e6fe1293f2e2d579c9fe5bbab056dd8b880e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"17ecefc9fdd8c554e0d03e5a990daef19f930add\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.16.8\",\n                            \"lessThan\": \"6.17\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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                        \"block/fops.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.56\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.10\",\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":[],"references":["https://git.kernel.org/stable/c/c97ef13ad96be0e08af38dfa2ed40cded0b53e1b","https://git.kernel.org/stable/c/dd33c03cefccdfcb223e9e6262643d64f8c1ae20","https://git.kernel.org/stable/c/2a42e6fe1293f2e2d579c9fe5bbab056dd8b880e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98821","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98821","identifiers":["CVE-2026-98821"]},"retained":false,"historicalAffected":[]}],"coverage":[]}