CVE-2026-74383
Linux nvme driver OOB index bug causes kernel crash and missing NVMe /dev nodes
Is CVE-2026-74383 being exploited?
Not confirmed. CVE-2026-74383 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.14% probability of exploitation in the next 30 days.
How severe is CVE-2026-74383?
CVE-2026-74383 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74383?
Yes. A fix has been recorded for CVE-2026-74383. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74383 affect?
CVE-2026-74383 affects Linux kernel nvme-pci module, nvme_core, Systems with NVMe controllers (CONFIG_NUMA=n). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74383?
Update Linux kernel to the fixed release and reboot NVMe hosts; verify /dev namespace nodes.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Out-of-bounds index causes kernel page fault/crash and loss of NVMe namespace /dev nodes, resulting in storage DoS.
Patch when possible
- affected>= d977506f8863807129d7a11f4057dfb1b38085ea and < 3e8aed5edaeeb237f97255d711aac6b5843fc059
- affected>= d977506f8863807129d7a11f4057dfb1b38085ea and < fa9b6accd1ad7af6914b409c6b003c417724c299
- affected>= d977506f8863807129d7a11f4057dfb1b38085ea and < a192b8cfa447e1b3701a13434a31c392b2e7ed29
- affected6.16
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.