Linux Kernel DoS via nf_conntrack_netlink memory leak
CVE-2023-7192 Published on January 2, 2024

Kernel: refcount leak in ctnetlink_create_conntrack()
A memory leak problem was found in ctnetlink_create_conntrack in net/netfilter/nf_conntrack_netlink.c in the Linux Kernel. This issue may allow a local attacker with CAP_NET_ADMIN privileges to cause a denial of service (DoS) attack due to a refcount overflow.

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Vulnerability Analysis

CVE-2023-7192 is exploitable with local system 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.

Attack Vector:
LOCAL
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

What is a Memory Leak Vulnerability?

The software does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is often triggered by improper handling of malformed data or unexpectedly interrupted sessions. In some languages, developers are responsible for tracking memory allocation and releasing the memory. If there are no more pointers or references to the memory, then it can no longer be tracked and identified for release.

CVE-2023-7192 has been classified to as a Memory Leak vulnerability or weakness.


Products Associated with CVE-2023-7192

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2023-7192 are published in these products:

Linux Kernel
 
Red Hat Enterprise Linux (RHEL)
 
Canonical Ubuntu Linux
 
Red Hat Rhel Tus
 
Red Hat Rhel Aus
 
Red Hat Rhel E4s
 
Red Hat Rhev Hypervisor
 
Red Hat Rhel Eus
 

Affected Versions

Red Hat Enterprise Linux 8.2 Advanced Update Support: Red Hat Enterprise Linux 8.2 Telecommunications Update Service: Red Hat Enterprise Linux 8.2 Telecommunications Update Service: Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: Red Hat Enterprise Linux 8.4 Telecommunications Update Service: Red Hat Enterprise Linux 8.4 Telecommunications Update Service: Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions: Red Hat Enterprise Linux 8.6 Extended Update Support: Red Hat Enterprise Linux 8.8 Extended Update Support: Red Hat Enterprise Linux 9.0 Extended Update Support: Red Hat Enterprise Linux 9.0 Extended Update Support: 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 Enterprise Linux 6: Red Hat Enterprise Linux 7: Red Hat Enterprise Linux 7: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9:

Exploit Probability

EPSS
0.03%
Percentile
8.44%

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.