What’s Vulnerable › Vulnerabilities

CVE-2023-6238: Kernel: nvme: memory corruption via unprivileged user passthrough

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-21 · updated 2026-06-17
• Weakness: CWE-120

Description

A buffer overflow vulnerability was found in the NVM Express (NVMe) driver in the Linux kernel. Only privileged user could specify a small meta buffer and let the device perform larger Direct Memory Access (DMA) into the same buffer, overwriting unrelated kernel memory, causing random kernel crashes and memory corruption.

Affected products

• Fedoraproject Fedora: 38
• Linux kernel: all versions

References

• https://access.redhat.com/security/cve/CVE-2023-6238
• https://bugzilla.redhat.com/show_bug.cgi?id=2250834
• https://access.redhat.com/security/cve/CVE-2023-6238
• https://bugzilla.redhat.com/show_bug.cgi?id=2250834

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