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CVE-2026-53397

kernel: nfsd: fix posix_acl leak on SETACL decode failure

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · July 19, 2026

Updated · October 13, 2026

Description

A flaw was found in the Linux kernel's Network File System Daemon (nfsd). This vulnerability occurs during the processing of Access Control List (ACL) set operations. If a specific decode step fails, a memory leak of a posix_acl object occurs. This can lead to resource exhaustion over time, potentially resulting in a Denial of Service (DoS) for the affected server.

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

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime