CVE-2026-31713

kernel: fuse: abort on fatal signal during sync init

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 1, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's Filesystem in Userspace (FUSE) component. When using synchronous initialization (sync init), if the FUSE server exits unexpectedly while processing the FUSE_INIT request, the filesystem creation process can hang. This issue occurs because the mounting thread keeps the device file descriptor open, preventing the operation from aborting. A local user could exploit this to cause a Denial of Service (DoS) by making the filesystem creation unresponsive.

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-911 · Improper Update of Reference Count