CVE-2026-30656
Received Received - Intake
NULL Pointer Dereference in fio v3.41 Causes Process Crash

Publication date: 2026-04-16

Last updated on: 2026-04-16

Assigner: MITRE

Description
A NULL pointer dereference vulnerability exists in fio (Flexible I/O Tester) v3.41 when parsing job files containing the fdp_pli option. The callback function str_fdp_pli_cb() does not validate the input pointer and calls strdup() on a NULL value when the option is specified without an argument. This results in a segmentation fault and process crash.
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Meta Information
Published
2026-04-16
Last Modified
2026-04-16
Generated
2026-06-16
AI Q&A
2026-04-16
EPSS Evaluated
2026-06-15
NVD
CVE-2026-30656
EUVD
EUVD-2026-23245
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
fio flexible_i_o_tester 3.41
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability is a NULL pointer dereference in the Flexible I/O Tester (fio) version 3.41. It occurs when parsing job files that contain the fdp_pli option without an argument. The function str_fdp_pli_cb() does not check if the input pointer is NULL before calling strdup() on it, which leads to a segmentation fault and causes the process to crash.

Impact Analysis

The impact of this vulnerability is that it can cause the fio process to crash due to a segmentation fault when processing certain job files. This could lead to denial of service if fio is used in automated testing or performance measurement environments.

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