Bug 2458951 (CVE-2026-30656)

Summary: CVE-2026-30656 fio: fio: Denial of Service via NULL pointer dereference when parsing job files
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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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.
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Description OSIDB Bzimport 2026-04-16 16:01:14 UTC 
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.