Kernel: null pointer dereference vulnerability in nft_dynset_init()

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Summary

CVECVE-2023-6622
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-12-08 18:15:07 UTC
Updated2026-11-05 12:17:37 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-476 | CWE-476 NULL Pointer Dereference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 38 All All All
Operating System Fedoraproject Fedora 39 All All All
Operating System Linux Linux Kernel 6.7 rc1 All All
Operating System Linux Linux Kernel 6.7 rc2 All All
Operating System Linux Linux Kernel 6.7 rc3 All All
Operating System Linux Linux Kernel 6.7 rc4 All All
Operating System Linux Linux Kernel All All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux 9.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:4.18.0-553.rt7.342.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:4.18.0-553.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:5.14.0-427.13.1.el9_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:5.14.0-427.13.1.el9_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified

References

ReferenceSourceLinkTags
github.com/torvalds/linux/commit/3701cd390fd731ee7ae8b8006246c8db82c72bea af854a3a-2127-422b-91ae-364da2661108 github.com Patch
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Third Party Advisory
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Third Party Advisory
bugzilla.redhat.com/show_bug.cgi af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Patch
access.redhat.com/errata/RHSA-2024:3138 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2024:2950 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
access.redhat.com/security/cve/CVE-2023-6622 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
access.redhat.com/errata/RHSA-2024:2394 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Xingyuan Mo ((IceSword Lab)) for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2023-12-08T00:00:00.000ZReported to Red Hat.
CNA2023-12-08T11:56:00.000ZMade public.

Workarounds

CNA: 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

Legacy QID Mappings

  • 161352 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel (ELSA-2024-12159)
  • 200099 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6624-1)
  • 200100 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6626-1)
  • 200103 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6628-1)
  • 200111 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6626-2)
  • 200116 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6639-1)
  • 200118 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6628-2)
  • 200120 Ubuntu Security Notification for Linux kernel (Azure) Vulnerabilities (USN-6626-3)
  • 200132 Ubuntu Security Notification for Linux kernel (Azure) Vulnerabilities (USN-6652-1)
  • 284821 Fedora Security Update for kernel (FEDORA-2023-dcee14345b)
  • 285095 Fedora Security Update for kernel (FEDORA-2023-26ffe7d3c7)
  • 357057 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.15-2024-035
  • 6000418 Debian Security Update for linux (DSA 5593-1)
  • 6140391 AWS Bottlerocket Security Update for kernel (GHSA-fph5-f829-x579)
  • 755604 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2024:0129-1)
  • 755607 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2024:0115-1)
  • 907842 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (32172-1)

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