CVE-2023-6622

Kernel: null pointer dereference vulnerability in nft_dynset_init()

Description

A null pointer dereference vulnerability was found in nft_dynset_init() in net/netfilter/nft_dynset.c in nf_tables in the Linux kernel. This issue may allow a local attacker with CAP_NET_ADMIN user privilege to trigger a denial of service.

Remediation

Workaround:

  • Mitigation for this issue is to skip loading the affected module "netfilter" onto the system till we have a fix available, this can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
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
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 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:2394 vendor advisory
https://access.redhat.com/errata/RHSA-2024:2950 vendor advisory
https://access.redhat.com/errata/RHSA-2024:3138 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-6622 third party advisory vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2253632 patch issue tracking
https://github.com/torvalds/linux/commit/3701cd390fd731ee7ae8b8006246c8db82c72bea patch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AAOVK2F3ALGKYIQ5IOMAYEC2DGI7BWAW/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G3AGDVE3KBLOOYBPISFDS74R4YAZEDAY/

Frequently Asked Questions

What is the severity of CVE-2023-6622?
CVE-2023-6622 has been scored as a medium severity vulnerability.
How to fix CVE-2023-6622?
As a workaround for remediating CVE-2023-6622: Mitigation for this issue is to skip loading the affected module "netfilter" onto the system till we have a fix available, this can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278
Is CVE-2023-6622 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-6622 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-2023-6622?
CVE-2023-6622 affects 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, 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 9.
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