What is CVE-2023-38431?

CVE-2023-38431 is a critical-severity vulnerability in Linux Linux_kernel, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2023-07-18.

How severe is CVE-2023-38431?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2023-38431 known to be exploited?

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

Out-of-bounds Read in Linux Linux_kernel

CVE-2023-38431

An issue was discovered in the Linux kernel before 6.3.8. fs/smb/server/connection.c in ksmbd does not validate the relationship between the NetBIOS header's length field and the SMB header sizes, via pdu_size in ksmbd_conn_handler_loop, l…

Vulnerability class: Buffer Overflow

EPSS: 0.012 (63.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

References

cve@mitre.org (Release Notes)
cve@mitre.org (Patch)
cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2023-38431?: CVE-2023-38431 is a critical-severity vulnerability in Linux Linux_kernel, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2023-07-18.
How severe is CVE-2023-38431?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2023-38431 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.