{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98821","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.372Z","datePublished":"2026-10-18T15:49:13.154Z","dateUpdated":"2026-10-19T09:26:14.186Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-19T09:26:14.186Z"},"descriptions":[{"lang":"en","value":"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/fops.c"],"versions":[{"version":"2729a60bbfb9215997f25372ebe9b7964f038296","lessThan":"c97ef13ad96be0e08af38dfa2ed40cded0b53e1b","status":"affected","versionType":"git"},{"version":"2729a60bbfb9215997f25372ebe9b7964f038296","lessThan":"dd33c03cefccdfcb223e9e6262643d64f8c1ae20","status":"affected","versionType":"git"},{"version":"2729a60bbfb9215997f25372ebe9b7964f038296","lessThan":"2a42e6fe1293f2e2d579c9fe5bbab056dd8b880e","status":"affected","versionType":"git"},{"version":"17ecefc9fdd8c554e0d03e5a990daef19f930add","status":"affected","versionType":"git"},{"version":"6.16.8","lessThan":"6.17","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/fops.c"],"versions":[{"version":"6.17","status":"affected"},{"version":"0","lessThan":"6.17","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16.8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c97ef13ad96be0e08af38dfa2ed40cded0b53e1b"},{"url":"https://git.kernel.org/stable/c/dd33c03cefccdfcb223e9e6262643d64f8c1ae20"},{"url":"https://git.kernel.org/stable/c/2a42e6fe1293f2e2d579c9fe5bbab056dd8b880e"}],"title":"block: reject polled dio with user integrity metadata","x_generator":{"engine":"bippy-1.2.0"}}}}