CVE-2026-89456

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-89456

Key Details

CVE	CVE-2026-89456
CVSS Score / Version	7.0 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is high; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89456
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89456

Source

Reference

NVD

CVE