What is CVE-2023-6238?

CVE-2023-6238 is a medium-severity vulnerability in Linux Kernel, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.7/10. Published 2023-11-21.

How severe is CVE-2023-6238?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Is CVE-2023-6238 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Linux Kernel

CVE-2023-6238

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.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (21.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-6238?: CVE-2023-6238 is a medium-severity vulnerability in Linux Kernel, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.7/10. Published 2023-11-21.
How severe is CVE-2023-6238?: Medium severity. CVSS v3 base score is 6.7 out of 10.
Is CVE-2023-6238 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.