{"id":"CVE-2026-89456","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89456","summary":"s390/dasd: Propagate partial completion length across ERP recovery","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: Propagate partial completion length across ERP recovery\n\ndasd_default_erp_postaction() copies the timing and device state from\nthe finished ERP request back to the original request but drops\nproc_bytes. A request that was partially completed, an ESE read of a\nnot-yet-allocated track returns fewer bytes than requested, and then\nrecovered through the ERP chain loses its partial-completion length.\n__dasd_cleanup_cqr() then sees proc_bytes == 0 and completes the whole\nrequest instead of requeueing the remainder, silently returning zeroed\ndata for the part that was never read.\n\nCarry proc_bytes over to the original request like the other\nper-request state.","published":"2026-09-11T19:43:20.037Z","modified":"2026-09-14T03:46:06.334664476Z","cvss":{"score":7,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.12.109"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/15ec03452c18e8d288e519837d21b308300d74b2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6fb5ba2e7e43173a3761e46f091070a8185efa14"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ceafb262475ac6cb3a7d07b1102608be2b216b99"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d6b8778b1b82aa3a8dbf8612080f635b834bd16b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89456.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89456"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-14T03:46:06.334664476Z"}}