UseAfterFree in Linux Netfilter via NFTA_RULE_CHAIN_ID
CVE-2023-4147 Published on August 7, 2023

A use-after-free flaw was found in the Linux kernels Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.

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Vulnerability Analysis

CVE-2023-4147 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2023-4147. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is a Dangling pointer Vulnerability?

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

CVE-2023-4147 has been classified to as a Dangling pointer vulnerability or weakness.


Products Associated with CVE-2023-4147

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2023-4147 are published in these products:

Linux Kernel
 
Fedora Project Fedora
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Enterprise Linux Real Time Nfv
 
Red Hat Enterprise Linux For Real Time
 
Red Hat Enterprise Linux Server Aus
 
Red Hat Enterprise Linux Eus
 
Debian Linux
 
Red Hat Rhel Eus
 

Affected Versions

Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9.0 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 6: Red Hat Enterprise Linux 7: Red Hat Enterprise Linux 7: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8:

Exploit Probability

EPSS
0.16%
Percentile
37.59%

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.