CVE-2026-89456
Description
A flaw was found in the Linux kernel. Specifically, within the s390/dasd component, an issue exists during error recovery for disk read operations. When a request is partially completed and then recovered, the system fails to correctly propagate the length of the processed data. This can lead to the kernel silently returning zeroed data for the unread portion of a request, potentially resulting in information disclosure to a local attacker.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory; Read Application Data
When reusing a resource such as memory or a program variable, the original contents of that resource may not be cleared before it is sent to an untrusted party.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
The uninitialized resource may contain values that cause program flow to change in ways that the programmer did not intend.
Frequently Asked Questions
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