CVE-2023-4459

Kernel: vmxnet3: null pointer dereference in vmxnet3_rq_cleanup()

Description

A NULL pointer dereference flaw was found in vmxnet3_rq_cleanup in drivers/net/vmxnet3/vmxnet3_drv.c in the networking sub-component in vmxnet3 in the Linux Kernel. This issue may allow a local attacker with normal user privilege to cause a denial of service due to a missing sanity check during cleanup.

Remediation

Workaround:

  • In order to mitigate this issue, prevent the affected code from being loaded by blacklisting the kernel module "vmxnet3". For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 ~~~ Exploiting this flaw will require CAP_NET_ADMIN access privilege in any user or network namespace. ~~~

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
Affected: Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:0412 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1250 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1306 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1367 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1382 vendor advisory
https://access.redhat.com/errata/RHSA-2024:2006 vendor advisory
https://access.redhat.com/errata/RHSA-2024:2008 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-4459 third party advisory vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2219268 patch issue tracking
https://github.com/torvalds/linux/commit/edf410cb74dc612fd47ef5be319c5a0bcd6e6ccd patch

Frequently Asked Questions

What is the severity of CVE-2023-4459?
CVE-2023-4459 has been scored as a medium severity vulnerability.
How to fix CVE-2023-4459?
As a workaround for remediating CVE-2023-4459: In order to mitigate this issue, prevent the affected code from being loaded by blacklisting the kernel module "vmxnet3". For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 ~~~ Exploiting this flaw will require CAP_NET_ADMIN access privilege in any user or network namespace. ~~~
Is CVE-2023-4459 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-4459 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-4459?
CVE-2023-4459 affects Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.
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