High 7.0Published Sep 11, 2026

CVE-2026-89456s390/dasd: Propagate partial completion length across ERP recovery

Updated under an hour ago (Oct 27, 2026, 10:30 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.0 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 5e6bdd37c5526ef01326df5dabb93011ee89237e before 9e063165d3fe58db2a517717b830f17e82d03467; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before 6b0954c8a259da1e4aa745989f82723947acfb46; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before d0a2f97d8c97134aa7f6a191940b7bab4bb42f5f; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before f735b9710f0c8fe72c1060103e865f4ae678190b; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before d6b8778b1b82aa3a8dbf8612080f635b834bd16b; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before ceafb262475ac6cb3a7d07b1102608be2b216b99; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before 15ec03452c18e8d288e519837d21b308300d74b2; from 5e6bdd37c5526ef01326df5dabb93011ee89237e before 6fb5ba2e7e43173a3761e46f091070a8185efa14; and 4 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/9e063165d3fe58db2a517717b830f17e82d03467
https://git.kernel.org/stable/c/6b0954c8a259da1e4aa745989f82723947acfb46
https://git.kernel.org/stable/c/d0a2f97d8c97134aa7f6a191940b7bab4bb42f5f
https://git.kernel.org/stable/c/f735b9710f0c8fe72c1060103e865f4ae678190b
https://git.kernel.org/stable/c/d6b8778b1b82aa3a8dbf8612080f635b834bd16b
https://git.kernel.org/stable/c/ceafb262475ac6cb3a7d07b1102608be2b216b99
https://git.kernel.org/stable/c/15ec03452c18e8d288e519837d21b308300d74b2
https://git.kernel.org/stable/c/6fb5ba2e7e43173a3761e46f091070a8185efa14

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.