CVE-2023-38431

CRITICAL EPSS 60.3%
Published Jul 18, 20232y ago · Modified Jun 17, 20262w ago
9.1 CVSS 3.1
Critical
Find Similar
Published Jul 18, 2023 2y ago
Last Modified Jun 17, 2026 2w ago

Description

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, leading to an out-of-bounds read.

CVSS Details

Base Score
9.1
Exploitability
3.9
Impact
5.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
60.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥5.15  –  <5.15.145
linuxlinux_kernel*≥5.16  –  <6.1.34
linuxlinux_kernel*≥6.2  –  <6.3.8
netappsolidfire_\&_hci_management_node*any
netapph300s*any
netapph410s*any
netapph500s*any
netapph700s*any

References 3

  • cdn.kernel.org https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.8
    Release Notes
  • git.kernel.org https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0
    Patch
  • security.netapp.com https://security.netapp.com/advisory/ntap-20230824-0011/
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0
    Patch