Vulnerability · Published Apr 16, 2026 · Assigned by mitre
CVE-2026-30656
High 7.5
In plain English
A high-severity null pointer dereference in the fio package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 79.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | fio | no fix listed | DEBIAN-CVE-2026-30656 |
| Debian:13 | fio | no fix listed | DEBIAN-CVE-2026-30656 |
| Debian:14 | fio | no fix listed | DEBIAN-CVE-2026-30656 |
| Ubuntu:22.04:LTS | fio | no fix listed | UBUNTU-CVE-2026-30656 |
| Ubuntu:24.04:LTS | fio | no fix listed | UBUNTU-CVE-2026-30656 |
| Ubuntu:25.10 | fio | no fix listed | UBUNTU-CVE-2026-30656 |
| Ubuntu:26.04:LTS | fio | no fix listed | UBUNTU-CVE-2026-30656 |
| Ubuntu:26.10 | fio | no fix listed | UBUNTU-CVE-2026-30656 |
Affected products (as reported)
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H