HIGH 7.5 Microsoft
CVE-2026-30656
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.
Microsoft Security Update 2026-Aug: 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.
Affected Products
- azl3 fio 3.37-3 on Azure Linux 3.0
- cbl2 fio 3.30-3
- cbl2 fio 3.30-3 on CBL Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-30656
- https://nvd.nist.gov/vuln/detail/CVE-2026-30656
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-08-06 via Microsoft. Affected: azl3 fio 3.37-3 on Azure Linux 3.0, cbl2 fio 3.30-3, cbl2 fio 3.30-3 on CBL Mariner 2.0.
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