s390/dasd: Propagate partial completion length across ERP recovery
Summary
| CVE | CVE-2026-89456 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-11 20:19:26 UTC |
| Updated | 2026-09-13 07:17:09 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 7 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001440000 probability, percentile 0.040390000 (date 2026-09-13)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7 | HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 7 | HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
HighPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 5e6bdd37c5526ef01326df5dabb93011ee89237e d6b8778b1b82aa3a8dbf8612080f635b834bd16b git | Not specified |
| CNA | Linux | Linux | affected 5e6bdd37c5526ef01326df5dabb93011ee89237e ceafb262475ac6cb3a7d07b1102608be2b216b99 git | Not specified |
| CNA | Linux | Linux | affected 5e6bdd37c5526ef01326df5dabb93011ee89237e 15ec03452c18e8d288e519837d21b308300d74b2 git | Not specified |
| CNA | Linux | Linux | affected 5e6bdd37c5526ef01326df5dabb93011ee89237e 6fb5ba2e7e43173a3761e46f091070a8185efa14 git | Not specified |
| CNA | Linux | Linux | affected fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04 git | Not specified |
| CNA | Linux | Linux | affected 5f7c9989f11305aaa43e0f4378f4f070022a9f2b git | Not specified |
| CNA | Linux | Linux | affected 5.4.26 5.5 semver | Not specified |
| CNA | Linux | Linux | affected 5.5.10 5.6 semver | Not specified |
| CNA | Linux | Linux | affected 5.6 | Not specified |
| CNA | Linux | Linux | unaffected 5.6 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.109 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.50 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.4 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/6fb5ba2e7e43173a3761e46f091070a8185efa14 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d6b8778b1b82aa3a8dbf8612080f635b834bd16b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/15ec03452c18e8d288e519837d21b308300d74b2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ceafb262475ac6cb3a7d07b1102608be2b216b99 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.