Answer in brief
CVE-2026-89456 records a High severity (CVSS 7.0) vulnerability in s390/dasd: Propagate partial completion length across ERP recovery. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5e6bdd37c5526ef01326df5dabb93011ee89237e <d6b8778b1b82aa3a8dbf8612080f635b834bd16b || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <ceafb262475ac6cb3a7d07b1102608be2b216b99 || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <15ec03452c18e8d288e519837d21b308300d74b2 || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <6fb5ba2e7e43173a3761e46f091070a8185efa14 || fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04 || 5f7c9989f11305aaa43e0f4378f4f070022a9f2b || >=5.4.26 <5.5 || >=5.5.10 <5.6 | d6b8778b1b82aa3a8dbf8612080f635b834bd16b, ceafb262475ac6cb3a7d07b1102608be2b216b99, 15ec03452c18e8d288e519837d21b308300d74b2, 6fb5ba2e7e43173a3761e46f091070a8185efa14, 5.5, 5.6 |
| Linux/Linuxgeneric | 5.6 | Not reported |
| Linux/Linuxgeneric | >=5e6bdd37c5526ef01326df5dabb93011ee89237e <9e063165d3fe58db2a517717b830f17e82d03467 || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <6b0954c8a259da1e4aa745989f82723947acfb46 || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <d0a2f97d8c97134aa7f6a191940b7bab4bb42f5f || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <f735b9710f0c8fe72c1060103e865f4ae678190b || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <d6b8778b1b82aa3a8dbf8612080f635b834bd16b || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <ceafb262475ac6cb3a7d07b1102608be2b216b99 || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <15ec03452c18e8d288e519837d21b308300d74b2 || >=5e6bdd37c5526ef01326df5dabb93011ee89237e <6fb5ba2e7e43173a3761e46f091070a8185efa14 || fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04 || 5f7c9989f11305aaa43e0f4378f4f070022a9f2b || >=5.4.26 <5.5 || >=5.5.10 <5.6 | 9e063165d3fe58db2a517717b830f17e82d03467, 6b0954c8a259da1e4aa745989f82723947acfb46, d0a2f97d8c97134aa7f6a191940b7bab4bb42f5f, f735b9710f0c8fe72c1060103e865f4ae678190b, d6b8778b1b82aa3a8dbf8612080f635b834bd16b, ceafb262475ac6cb3a7d07b1102608be2b216b99, 15ec03452c18e8d288e519837d21b308300d74b2, 6fb5ba2e7e43173a3761e46f091070a8185efa14, 5.5, 5.6 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: s390/dasd: Propagate partial completion length across ERP recovery dasd_default_erp_postaction() copies the timing and device state from the finished ERP request back to the original request but drops proc_bytes. A request that was partially completed, an ESE read of a not-yet-allocated track returns fewer bytes than requested, and then recovered through the ERP chain loses its partial-completion length. __dasd_cleanup_cqr() then sees proc_bytes == 0 and completes the whole request instead of requeueing the remainder, silently returning zeroed data for the part that was never read. Carry proc_bytes over to the original request like the other per-request state.
Quoted source text, attributed separately from HOL analysis.