How severe is CVE-2026-30656?

CVE-2026-30656 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-30656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-30656?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-30656 have an EU (EUVD) identifier?

Yes. CVE-2026-30656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23245.

When was CVE-2026-30656 published?

CVE-2026-30656 was published on 2026-04-16 and last updated on 2026-06-17.

CVE-2026-30656

CVE-2026-30656 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23245
Weakness: CWE-476
Published: 2026-04-16
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-30656?: CVE-2026-30656 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-30656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-30656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-30656 have an EU (EUVD) identifier?: Yes. CVE-2026-30656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23245.
When was CVE-2026-30656 published?: CVE-2026-30656 was published on 2026-04-16 and last updated on 2026-06-17.

References

Other CWE-476 (NULL Pointer Dereference) vulnerabilities

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