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CVE-2026-64066

kernel: netfs: Fix netfs_read_to_pagecache() to pause on subreq failure

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Severity

Moderate

Red Hat Product Security

7.1

CVSS 3.1

Review impact separately from score.

Published · July 19, 2026

Updated · August 20, 2026

Description

A flaw was found in the Linux kernel's netfs component. The netfs_read_to_pagecache() function does not properly pause the generation of new subrequests when a previously issued subrequest has failed. This oversight can lead to continued resource consumption or incorrect system state, potentially resulting in system instability or a denial of service (DoS) condition.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 7.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

CWE-1050 · Excessive Platform Resource Consumption within a Loop