{"id":"CVE-2026-89458","summary":"s390/dasd: Do not complete a failed ESE read as successful","details":"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.","modified":"2026-09-15T03:48:19.852378556Z","published":"2026-09-11T19:43:21.346Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89458.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/52b331c99baac653ca794bd8487c8ec4de8db203"},{"type":"WEB","url":"https://git.kernel.org/stable/c/55f4df40178cdfede0d7ae848fbab00efa9b95c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/77168af195d04b34c6de62b874624e74d64cef8d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8cb96cffceead3cbd0541154d7ecc5e6474edda1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/921ff697bb6f7067059793becf8b2d00de71ce41"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c9adf8399732306dfc97b3adb4778038743e3f5e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cddb447c62466f3076938ce120028d7b591f9f37"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89458.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89458"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5e6bdd37c5526ef01326df5dabb93011ee89237e"},{"fixed":"8cb96cffceead3cbd0541154d7ecc5e6474edda1"},{"fixed":"77168af195d04b34c6de62b874624e74d64cef8d"},{"fixed":"921ff697bb6f7067059793becf8b2d00de71ce41"},{"fixed":"55f4df40178cdfede0d7ae848fbab00efa9b95c1"},{"fixed":"c9adf8399732306dfc97b3adb4778038743e3f5e"},{"fixed":"52b331c99baac653ca794bd8487c8ec4de8db203"},{"fixed":"b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f"},{"fixed":"cddb447c62466f3076938ce120028d7b591f9f37"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04"},{"last_affected":"5f7c9989f11305aaa43e0f4378f4f070022a9f2b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.26"},{"fixed":"5.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.5.10"},{"fixed":"5.6"}]}],"versions":["v5.5.9","v5.4.25","v5.4.24","v5.5.8","v5.5.7","v5.4.23","v5.5.6","v5.4.22","v5.5.5","v5.4.21","v5.5.4","v5.4.20","v5.5.3","v5.4.19","v5.5.2","v5.4.18","v5.5","v5.4.17","v5.5.1","v5.5-rc5","v5.4.16","v5.5-rc7","v5.5-rc2","v5.5-rc1","v5.4.15","v5.4","v5.4.14","v5.5-rc4","v5.4.13","v5.5-rc3","v5.5-rc6","v5.4.12","v5.4.11","v5.4.10","v5.4.9","v5.4.8","v5.4.7","v5.4.6","v5.4.5","v5.4.4","v5.4.3","v5.4.2","v5.4-rc1","v5.4.1","v5.4-rc6","v5.4-rc3","v5.4-rc4","v5.4-rc8","v5.4-rc7","v5.4-rc5","v5.3","v5.4-rc2","v5.3-rc5","v5.3-rc1","v5.3-rc2","v5.3-rc3","v5.3-rc8","v5.3-rc7","v5.3-rc4","v5.2","v5.3-rc6","v5.2-rc2","v5.2-rc7","v5.2-rc4","v5.2-rc1","v5.2-rc5","v5.2-rc6","v5.2-rc3","v5.1","v5.0-rc8","v5.1-rc7","v5.1-rc1","v5.1-rc6","v5.1-rc5","v5.0","v5.1-rc3","v5.1-rc2","v5.1-rc4","v5.0-rc1","v5.0-rc4","v5.0-rc3","v5.0-rc6","v5.0-rc7","v5.0-rc2","v5.0-rc5","v4.20-rc1","v4.19","v4.20","v4.20-rc7","v4.20-rc5","v4.20-rc6","v4.20-rc4","v4.20-rc2","v4.20-rc3","v4.19-rc2","v4.19-rc8","v4.19-rc4","v4.19-rc1","v4.19-rc7","v4.19-rc6","v4.19-rc5","v4.19-rc3","v4.18","v4.18-rc1","v4.18-rc8","v4.18-rc2","v4.18-rc5","v4.18-rc6","v4.18-rc7","v4.17","v4.18-rc3","v4.18-rc4","v4.17-rc1","v4.17-rc2","v4.17-rc7","v4.17-rc3","v4.17-rc4","v4.16","v4.17-rc6","v4.17-rc5","v4.16-rc7","v4.16-rc4","v4.16-rc1","v4.16-rc2","v4.16-rc5","v4.16-rc3","v4.16-rc6","v4.14","v4.15","v4.15-rc1","v4.15-rc4","v4.15-rc9","v4.15-rc8","v4.15-rc7","v4.15-rc3","v4.15-rc2","v4.15-rc5","v4.15-rc6","v4.14-rc1","v4.14-rc7","v4.14-rc3","v4.13","v4.14-rc8","v4.14-rc4","v4.14-rc6","v4.14-rc2","v4.14-rc5","v4.13-rc2","v4.13-rc1","v4.13-rc3","v4.13-rc7","v4.13-rc4","v4.13-rc5","v4.13-rc6","v4.12-rc1","v4.12","v4.12-rc5","v4.12-rc7","v4.12-rc6","v4.12-rc4","v4.12-rc2","v4.12-rc3","v4.11","v4.11-rc1","v4.11-rc6","v4.11-rc8","v4.11-rc7","v4.11-rc3","v4.11-rc5","v4.11-rc2","v4.11-rc4","v4.10","v4.9","v4.10-rc8","v4.10-rc3","v4.10-rc1","v4.10-rc7","v4.10-rc6","v4.10-rc2","v4.10-rc5","v4.10-rc4","v4.9-rc7","v4.9-rc6","v4.9-rc8","v4.9-rc1","v4.9-rc5","v4.9-rc3","v4.9-rc4","v4.9-rc2","v4.8","v4.8-rc8","v4.8-rc2","v4.8-rc1","v4.8-rc7","v4.8-rc6","v4.8-rc5","v4.8-rc4","v4.8-rc3","v4.7","v4.7-rc4","v4.7-rc2","v4.7-rc1","v4.7-rc7","v4.7-rc6","v4.7-rc3","v4.7-rc5","v4.6","v4.6-rc1","v4.6-rc6","v4.6-rc4","v4.6-rc7","v4.6-rc5","v4.5-rc4","v4.6-rc2","v4.6-rc3","v4.5","v4.4","v4.5-rc1","v4.5-rc6","v4.5-rc2","v4.5-rc7","v4.5-rc5","v4.5-rc3","v4.4-rc1","v4.4-rc2","v4.4-rc8","v4.4-rc3","v4.4-rc7","v4.4-rc5","v4.4-rc6","v4.4-rc4","v4.3","v4.3-rc1","v4.3-rc6","v4.3-rc4","v4.3-rc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