{"api_version":"1","generated_at":"2026-09-12T00:47:37+00:00","cve":"CVE-2026-89458","urls":{"html":"https://cve.report/CVE-2026-89458","api":"https://cve.report/api/cve/CVE-2026-89458.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89458","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89458"},"summary":{"title":"s390/dasd: Do not complete a failed ESE read as successful","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: Do not complete a failed ESE read as successful\n\ndasd_int_handler() completes an NRF read of an unallocated ESE track by\ncalling ese_read() and unconditionally marking the request\nDASD_CQR_SUCCESS. dasd_eckd_ese_read() can return an error before it has\nzeroed the destination buffer: a failed sense-data parse or a current\ntrack outside the requested range both return early, leaving the\ndestination pages untouched. The request is still completed successfully,\nso the block layer is handed stale / uninitialized memory instead of\nzeros.\n\nCheck the ese_read() return value and fail the request through the normal\nerror path instead of forcing DASD_CQR_SUCCESS.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:26","updated_at":"2026-09-11 20:19:26"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/cddb447c62466f3076938ce120028d7b591f9f37","name":"https://git.kernel.org/stable/c/cddb447c62466f3076938ce120028d7b591f9f37","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c9adf8399732306dfc97b3adb4778038743e3f5e","name":"https://git.kernel.org/stable/c/c9adf8399732306dfc97b3adb4778038743e3f5e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/52b331c99baac653ca794bd8487c8ec4de8db203","name":"https://git.kernel.org/stable/c/52b331c99baac653ca794bd8487c8ec4de8db203","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f","name":"https://git.kernel.org/stable/c/b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89458","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89458","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6bdd37c5526ef01326df5dabb93011ee89237e c9adf8399732306dfc97b3adb4778038743e3f5e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6bdd37c5526ef01326df5dabb93011ee89237e 52b331c99baac653ca794bd8487c8ec4de8db203 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6bdd37c5526ef01326df5dabb93011ee89237e b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6bdd37c5526ef01326df5dabb93011ee89237e cddb447c62466f3076938ce120028d7b591f9f37 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5f7c9989f11305aaa43e0f4378f4f070022a9f2b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4.26 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.5.10 5.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.6","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/s390/block/dasd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c9adf8399732306dfc97b3adb4778038743e3f5e","status":"affected","version":"5e6bdd37c5526ef01326df5dabb93011ee89237e","versionType":"git"},{"lessThan":"52b331c99baac653ca794bd8487c8ec4de8db203","status":"affected","version":"5e6bdd37c5526ef01326df5dabb93011ee89237e","versionType":"git"},{"lessThan":"b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f","status":"affected","version":"5e6bdd37c5526ef01326df5dabb93011ee89237e","versionType":"git"},{"lessThan":"cddb447c62466f3076938ce120028d7b591f9f37","status":"affected","version":"5e6bdd37c5526ef01326df5dabb93011ee89237e","versionType":"git"},{"status":"affected","version":"fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04","versionType":"git"},{"status":"affected","version":"5f7c9989f11305aaa43e0f4378f4f070022a9f2b","versionType":"git"},{"lessThan":"5.5","status":"affected","version":"5.4.26","versionType":"semver"},{"lessThan":"5.6","status":"affected","version":"5.5.10","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/s390/block/dasd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.6"},{"lessThan":"5.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: Do not complete a failed ESE read as successful\n\ndasd_int_handler() completes an NRF read of an unallocated ESE track by\ncalling ese_read() and unconditionally marking the request\nDASD_CQR_SUCCESS. dasd_eckd_ese_read() can return an error before it has\nzeroed the destination buffer: a failed sense-data parse or a current\ntrack outside the requested range both return early, leaving the\ndestination pages untouched. The request is still completed successfully,\nso the block layer is handed stale / uninitialized memory instead of\nzeros.\n\nCheck the ese_read() return value and fail the request through the normal\nerror path instead of forcing DASD_CQR_SUCCESS."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:43:21.346Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c9adf8399732306dfc97b3adb4778038743e3f5e"},{"url":"https://git.kernel.org/stable/c/52b331c99baac653ca794bd8487c8ec4de8db203"},{"url":"https://git.kernel.org/stable/c/b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f"},{"url":"https://git.kernel.org/stable/c/cddb447c62466f3076938ce120028d7b591f9f37"}],"title":"s390/dasd: Do not complete a failed ESE read as successful","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89458","datePublished":"2026-09-11T19:43:21.346Z","dateReserved":"2026-09-11T19:38:34.707Z","dateUpdated":"2026-09-11T19:43:21.346Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:26","lastModifiedDate":"2026-09-11 20:19:26","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89458","Ordinal":"1","Title":"s390/dasd: Do not complete a failed ESE read as successful","CVE":"CVE-2026-89458","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89458","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: Do not complete a failed ESE read as successful\n\ndasd_int_handler() completes an NRF read of an unallocated ESE track by\ncalling ese_read() and unconditionally marking the request\nDASD_CQR_SUCCESS. dasd_eckd_ese_read() can return an error before it has\nzeroed the destination buffer: a failed sense-data parse or a current\ntrack outside the requested range both return early, leaving the\ndestination pages untouched. The request is still completed successfully,\nso the block layer is handed stale / uninitialized memory instead of\nzeros.\n\nCheck the ese_read() return value and fail the request through the normal\nerror path instead of forcing DASD_CQR_SUCCESS.","Type":"Description","Title":"s390/dasd: Do not complete a failed ESE read as successful"}]}}}