CVE-2023-7192 (GCVE-0-2023-7192)

Vulnerability from cvelistv5 – Published: 2024-01-02 19:02 – Updated: 2025-11-20 18:07
VLAI?
Title
Kernel: refcount leak in ctnetlink_create_conntrack()
Summary
A memory leak problem was found in ctnetlink_create_conntrack in net/netfilter/nf_conntrack_netlink.c in the Linux Kernel. This issue may allow a local attacker with CAP_NET_ADMIN privileges to cause a denial of service (DoS) attack due to a refcount overflow.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support Unaffected: 0:4.18.0-193.133.1.el8_2 , < * (rpm)
    cpe:/o:redhat:rhel_tus:8.2::baseos
    cpe:/o:redhat:rhel_e4s:8.2::baseos
    cpe:/o:redhat:rhel_aus:8.2::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service Unaffected: 0:4.18.0-193.133.1.rt13.184.el8_2 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.2::realtime
    cpe:/a:redhat:rhel_tus:8.2::nfv
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service Unaffected: 0:4.18.0-193.133.1.el8_2 , < * (rpm)
    cpe:/o:redhat:rhel_tus:8.2::baseos
    cpe:/o:redhat:rhel_e4s:8.2::baseos
    cpe:/o:redhat:rhel_aus:8.2::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions Unaffected: 0:4.18.0-193.133.1.el8_2 , < * (rpm)
    cpe:/o:redhat:rhel_tus:8.2::baseos
    cpe:/o:redhat:rhel_e4s:8.2::baseos
    cpe:/o:redhat:rhel_aus:8.2::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:4.18.0-305.125.1.el8_4 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.4::baseos
    cpe:/o:redhat:rhel_tus:8.4::baseos
    cpe:/o:redhat:rhel_aus:8.4::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service Unaffected: 0:4.18.0-305.125.1.rt7.201.el8_4 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.4::nfv
    cpe:/a:redhat:rhel_tus:8.4::realtime
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service Unaffected: 0:4.18.0-305.125.1.el8_4 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.4::baseos
    cpe:/o:redhat:rhel_tus:8.4::baseos
    cpe:/o:redhat:rhel_aus:8.4::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Unaffected: 0:4.18.0-305.125.1.el8_4 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.4::baseos
    cpe:/o:redhat:rhel_tus:8.4::baseos
    cpe:/o:redhat:rhel_aus:8.4::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Unaffected: 0:4.18.0-372.95.1.el8_6 , < * (rpm)
    cpe:/o:redhat:rhel_eus:8.6::baseos
    cpe:/a:redhat:rhel_eus:8.6::crb
    cpe:/o:redhat:rhev_hypervisor:4.4::el8
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support Unaffected: 0:4.18.0-477.51.1.el8_8 , < * (rpm)
    cpe:/o:redhat:rhel_eus:8.8::baseos
    cpe:/a:redhat:rhel_eus:8.8::crb
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support Unaffected: 0:5.14.0-70.93.2.el9_0 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.0::appstream
    cpe:/a:redhat:rhel_eus:9.0::crb
    cpe:/o:redhat:rhel_eus:9.0::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support Unaffected: 0:5.14.0-70.93.1.rt21.165.el9_0 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.0::nfv
    cpe:/a:redhat:rhel_eus:9.0::realtime
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support Unaffected: 0:5.14.0-284.52.1.el9_2 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.2::crb
    cpe:/a:redhat:rhel_eus:9.2::appstream
    cpe:/o:redhat:rhel_eus:9.2::baseos
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support Unaffected: 0:5.14.0-284.52.1.rt14.337.el9_2 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.2::nfv
    cpe:/a:redhat:rhel_eus:9.2::realtime
 Create a notification for this product.
    Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-372.95.1.el8_6 , < * (rpm)
    cpe:/o:redhat:rhel_eus:8.6::baseos
    cpe:/a:redhat:rhel_eus:8.6::crb
    cpe:/o:redhat:rhev_hypervisor:4.4::el8
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
 Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
 Create a notification for this product.
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\"versions\": [{\"status\": \"unaffected\", \"version\": \"0:5.14.0-70.93.2.el9_0\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"kernel\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:rhel_eus:9.0::nfv\", \"cpe:/a:redhat:rhel_eus:9.0::realtime\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9.0 Extended Update Support\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:5.14.0-70.93.1.rt21.165.el9_0\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"kernel-rt\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:rhel_eus:9.2::crb\", \"cpe:/a:redhat:rhel_eus:9.2::appstream\", \"cpe:/o:redhat:rhel_eus:9.2::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9.2 Extended Update Support\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:5.14.0-284.52.1.el9_2\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"kernel\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:rhel_eus:9.2::nfv\", \"cpe:/a:redhat:rhel_eus:9.2::realtime\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9.2 Extended Update Support\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:5.14.0-284.52.1.rt14.337.el9_2\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"kernel-rt\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:rhel_eus:8.6::baseos\", \"cpe:/a:redhat:rhel_eus:8.6::crb\", \"cpe:/o:redhat:rhev_hypervisor:4.4::el8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Virtualization 4 for Red Hat Enterprise Linux 8\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:4.18.0-372.95.1.el8_6\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"kernel\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:6\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 6\", \"packageName\": \"kernel\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 7\", \"packageName\": \"kernel\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 7\", \"packageName\": \"kernel-rt\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8\", \"packageName\": \"kernel\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8\", \"packageName\": \"kernel-rt\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"packageName\": \"kernel\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"packageName\": \"kernel-rt\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2023-09-13T00:00:00+00:00\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2023-02-10T00:00:00+00:00\", \"value\": \"Made public.\"}], \"datePublic\": \"2023-02-10T00:00:00.000Z\", \"references\": [{\"url\": \"https://access.redhat.com/errata/RHSA-2024:0723\", \"name\": \"RHSA-2024:0723\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0725\", \"name\": \"RHSA-2024:0725\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:1188\", \"name\": \"RHSA-2024:1188\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:1250\", \"name\": \"RHSA-2024:1250\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:1306\", \"name\": \"RHSA-2024:1306\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:1367\", \"name\": \"RHSA-2024:1367\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:1382\", \"name\": \"RHSA-2024:1382\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:1404\", \"name\": \"RHSA-2024:1404\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:2006\", \"name\": \"RHSA-2024:2006\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:2008\", \"name\": \"RHSA-2024:2008\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2023-7192\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2256279\", \"name\": \"RHBZ#2256279\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=ac4893980bbe79ce383daf9a0885666a30fe4c83\"}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Triggering this issue requires the ability to create user/net namespaces.\\n\\nOn non-containerized deployments of Red Hat Enterprise Linux 8, you can disable user namespaces by setting user.max_user_namespaces to 0:\\n\\n# echo \\\"user.max_user_namespaces=0\\\" \u003e /etc/sysctl.d/userns.conf\\n# sysctl -p /etc/sysctl.d/userns.conf\\n\\nOn containerized deployments, such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled.\\n\\nAlternatively, skip loading the affected netfilter module (i.e., nf_conntrack_netlink) onto the system until we have a fix available. This can be done by a blacklist mechanism which will ensure the driver is not loaded at boot time.\\n~~~\\nHow do I blacklist a kernel module to prevent it from loading automatically?\\nhttps://access.redhat.com/solutions/41278 \\n~~~\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A memory leak problem was found in ctnetlink_create_conntrack in net/netfilter/nf_conntrack_netlink.c in the Linux Kernel. This issue may allow a local attacker with CAP_NET_ADMIN privileges to cause a denial of service (DoS) attack due to a refcount overflow.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-401\", \"description\": \"Missing Release of Memory after Effective Lifetime\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2025-11-20T18:07:32.157Z\"}, \"x_redhatCweChain\": \"CWE-401: Missing Release of Memory after Effective Lifetime\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-7192\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-20T18:07:32.157Z\", \"dateReserved\": \"2023-12-30T18:12:05.167Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2024-01-02T19:02:45.371Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.