CVE-2023-6238

Kernel: nvme: memory corruption via unprivileged user passthrough

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.

Remediation

Workaround:

  • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Category

6.7
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Third-Party Advisory redhat.com Third-Party Advisory redhat.com
Affected: n/a kernel
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Fedora Fedora
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/security/cve/CVE-2023-6238 third party advisory vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2250834 third party advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-6238?
CVE-2023-6238 has been scored as a medium severity vulnerability.
How to fix CVE-2023-6238?
As a workaround for remediating CVE-2023-6238: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Is CVE-2023-6238 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-6238 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-6238?
CVE-2023-6238 affects n/a kernel, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Fedora Fedora.
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