Linux Kernel Local user DOS via pfn_swap_entry_to_page
CVE-2023-4732 Published on October 3, 2023

A flaw was found in pfn_swap_entry_to_page in memory management subsystem in the Linux Kernel. In this flaw, an attacker with a local user privilege may cause a denial of service problem due to a BUG statement referencing pmd_t x.

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Vulnerability Analysis

CVE-2023-4732 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is consided to have a high level of 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:
HIGH
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

Race Condition within a Thread

If two threads of execution use a resource simultaneously, there exists the possibility that resources may be used while invalid, in turn making the state of execution undefined.


Products Associated with CVE-2023-4732

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2023-4732 are published in these products:

Linux Kernel
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Codeready Linux Builder
 
Red Hat Enterprise Linux For Real Time
 
Red Hat Enterprise Linux Real Time Nfv
 
Red Hat Enterprise Linux Power Little Endian
 
Red Hat Enterprise Linux Ibm Z Systems
 
Red Hat Enterprise Linux For Arm 64
 
Red Hat Codeready Linux Builder Arm64
 
Red Hat Codeready Linux Builder Power Little Endian
 
Red Hat Rhev Hypervisor
 
Red Hat Rhel Eus
 

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 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 9: Red Hat Enterprise Linux 9:

Exploit Probability

EPSS
0.01%
Percentile
1.69%

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.