CVE-2026-30656

fio: fio: Denial of Service via NULL pointer dereference when parsing job files

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · April 16, 2026

Updated · June 28, 2026

Description

A flaw was found in fio (Flexible I/O Tester). A local user could exploit this vulnerability by providing a specially crafted job file that includes the fdp_pli option without an argument. This leads to a NULL pointer dereference, which occurs when the program attempts to access a memory location that has not been assigned, resulting in a segmentation fault and a Denial of Service (DoS) due to a process crash.

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-476 · NULL Pointer Dereference