Linux Kernel NVMe-over-TCP NULL ptr deref leads to DoS
CVE-2023-6535 Published on February 7, 2024

Kernel: null pointer dereference in nvmet_tcp_execute_request
A flaw was found in the Linux kernel's NVMe driver. This issue may allow an unauthenticated malicious actor to send a set of crafted TCP packages when using NVMe over TCP, leading the NVMe driver to a NULL pointer dereference in the NVMe driver, causing kernel panic and a denial of service.

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Vulnerability Analysis

CVE-2023-6535 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Exploitation:
NONE
Automatable:
NO
Technical Impact:
PARTIAL
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Timeline

Reported to Red Hat.

Made public.

Weakness Type

NULL Pointer Dereference

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.


Products Associated with CVE-2023-6535

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2023-6535 are published in these products:

Linux Kernel
Red Hat Enterprise Linux (RHEL)
Red Hat Enterprise Linux Server Aus
Red Hat Enterprise Linux Server Tus
Red Hat Enterprise Linux Eus
Red Hat Codeready Linux Builder Eus
Red Hat Enterprise Linux Power Little Endian Eus
Red Hat Codeready Linux Builder Arm64 Eus
Red Hat Codeready Linux Builder Ibm Z Systems Eus
Red Hat Codeready Linux Builder Eus Power Little Endian Eus
Red Hat Enterprise Linux Server Power Little Endian Update Services Sap Solutions
Red Hat Enterprise Linux Arm 64 Eus
Red Hat Enterprise Linux Ibm Z Systems Eus
Red Hat Enterprise Linux Real Time Nfv
Red Hat Enterprise Linux For Real Time
Canonical Ubuntu Linux
Red Hat Rhel Eus
Red Hat Rhev Hypervisor
Red Hat Logging
Red Hat Rhel Els

Affected Versions

Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8.6 Extended Update Support: Red Hat Enterprise Linux 8.8 Extended Update Support: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9.2 Extended Update Support: Red Hat Enterprise Linux 9.2 Extended Update Support: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat RHOL-5.8-RHEL-9: Red Hat Enterprise Linux 6: Red Hat Enterprise Linux 7: Red Hat Enterprise Linux 7: Red Hat Enterprise Linux 9:

Exploit Probability

EPSS
1.55%
Percentile
75.44%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.