Disclosure summary
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.
Source-reported weakness categories
CWE-476
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Apr
Open original source · Updated Sep 24, 2026
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.
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 7.5
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | azl3 fio 3.37-3 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 fio 3.30-3 | (MSRC status code 3) |
| Microsoft update guide | cbl2 fio 3.30-3 on CBL-Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 fio 3.30-3 on CBL Mariner 2.0 | (MSRC status code 3) |
Vendor remediation references
- CBL-Mariner Releases · build 3.37-4 · product IDs 20574-17084
- Vendor guidance · product IDs 20574-17084
- Release Notes · product IDs 20544-21692
- Vendor guidance · product IDs 20544-21692
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-05-02T21:02:35-04:00
MODIFIED 2026-09-24T22:39:54-04:00
INGESTED 2026-10-08T12:40:42-04:00