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Fencer Vulns
medium 5.5

CVE-2023-7192 json

Kernel: refcount leak in ctnetlink_create_conntrack()

published 2024-01-02 2 y ago modified 2026-11-05 3 d ago also EUVD-2023-59373

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:4.18.0-193.133.1.el8_2
  • Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service 0:4.18.0-193.133.1.el8_2, 0:4.18.0-193.133.1.rt13.184.el8_2
  • Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions 0:4.18.0-193.133.1.el8_2
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.125.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service 0:4.18.0-305.125.1.el8_4, 0:4.18.0-305.125.1.rt7.201.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions 0:4.18.0-305.125.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support 0:4.18.0-372.95.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support 0:4.18.0-477.51.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:5.14.0-70.93.1.rt21.165.el9_0, 0:5.14.0-70.93.2.el9_0
  • Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:5.14.0-284.52.1.el9_2, 0:5.14.0-284.52.1.rt14.337.el9_2
  • Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 0:4.18.0-372.95.1.el8_6
  • linux Debian 14, Debian 13, Debian 12 6.1.20-1

debian advisories DEBIAN-CVE-2023-7192

  • linux Ubuntu 20.04 LTS 5.4.0-152.169
  • linux Ubuntu 22.04 LTS 5.15.0-79.86
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1104.112
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1042.47
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1107.116
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1039.47
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1039.44
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1051.56

ubuntu advisories UBUNTU-CVE-2023-7192

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • perf rhev hypervisor 4.4, RHEL 8.6 EUS 4.18.0-372.95.1.el8_6
  • kernel-rt RHEL 8.2 TUS 4.18.0-193.133.1.rt13.184.el8_2
  • kernel-rt-kvm RHEL 8.2 TUS 4.18.0-193.133.1.rt13.184.el8_2
  • kernel-rt-core RHEL 8.2 TUS 4.18.0-193.133.1.rt13.184.el8_2
  • kernel-rt-modules RHEL 8.2 TUS 4.18.0-193.133.1.rt13.184.el8_2
  • kernel-rt-debug-kvm RHEL 8.2 TUS 4.18.0-193.133.1.rt13.184.el8_2
  • kernel-rt-debug-core RHEL 8.2 TUS 4.18.0-193.133.1.rt13.184.el8_2
  • kernel-rt-debug-modules RHEL 8.2 TUS 4.18.0-193.133.1.rt13.184.el8_2

red hat advisories RHSA-2024:2008RHSA-2024:2006RHSA-2024:1404RHSA-2024:1382RHSA-2024:1367RHSA-2024:1306

  • kernel-syms SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-122.216.1
  • kernel-source SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-122.216.1
  • kernel-default SLES for SAP 12 SP5, SLES 12 SP5, SLE Workstation Extension 12 SP5 +2 more 4.12.14-122.216.1
  • kernel-obs-build SLE Software Development Kit 12 SP5 4.12.14-122.216.1
  • kernel-rt SLE Micro 5.4, SLE Micro 5.3, openSUSE Leap Micro 5.4 +1 more 5.14.21-150400.15.79.1
  • kernel-source-rt SLE Micro 5.4, SLE Micro 5.3 5.14.21-150400.15.79.1
  • kernel-rt SLE Real Time 12 SP5 4.12.14-10.182.1
  • kernel-syms-rt SLE Real Time 12 SP5 4.12.14-10.182.1

suse advisories SUSE-SU-2024:1870-1SUSE-SU-2024:1647-1SUSE-SU-2024:1646-1SUSE-SU-2024:1643-1SUSE-SU-2024:1641-1SUSE-SU-2024:1490-1

  • kernel CBL-Mariner 2.0 5.15.148.1-1

azure linux advisories AZL-32316

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-7192 updated cvss 5.5

kernel: refcount leak in ctnetlink_create_conntrack()

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    affected: workaround, no fix available
  • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-debuginfo-common-x86_64 4.18.0-372.95.1.el8_6, kernel-debuginfo-common-aarch64 4.18.0-372.95.1.el8_6, kernel-debuginfo-common-ppc64le 4.18.0-372.95.1.el8_6
    fixed: vendor fix RHSA-2024:1188
  • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.51.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.51.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.51.1.el8_8
    fixed: vendor fix RHSA-2024:1404
  • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-debuginfo-common-s390x 5.14.0-70.93.2.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.93.2.el9_0, kernel-debuginfo-common-aarch64 5.14.0-70.93.2.el9_0, kernel-debuginfo-common-ppc64le 5.14.0-70.93.2.el9_0
    fixed: vendor fix RHSA-2024:1250
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.52.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.52.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.52.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.52.1.el9_2
    fixed: vendor fix RHSA-2024:0723
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) perf 5.14.0-70.93.2.el9_0, kernel-devel-matched 5.14.0-70.93.2.el9_0, kernel-debug-devel-matched 5.14.0-70.93.2.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.93.2.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.93.2.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.93.2.el9_0, +2 more
    fixed: vendor fix RHSA-2024:1250
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.52.1.el9_2, rtla 5.14.0-284.52.1.el9_2, kernel-devel-matched 5.14.0-284.52.1.el9_2, kernel-64k-devel-matched 5.14.0-284.52.1.el9_2, kernel-debug-devel-matched 5.14.0-284.52.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.52.1.el9_2, +5 more
    fixed: vendor fix RHSA-2024:0723
show 18 more
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.133.1.el8_2, kernel 4.18.0-193.133.1.el8_2, bpftool 4.18.0-193.133.1.el8_2, kernel-core 4.18.0-193.133.1.el8_2, kernel-tools 4.18.0-193.133.1.el8_2, python3-perf 4.18.0-193.133.1.el8_2, +8 more
    fixed: vendor fix RHSA-2024:2006
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.125.1.el8_4, kernel 4.18.0-305.125.1.el8_4, bpftool 4.18.0-305.125.1.el8_4, kernel-core 4.18.0-305.125.1.el8_4, kernel-tools 4.18.0-305.125.1.el8_4, python3-perf 4.18.0-305.125.1.el8_4, +8 more
    fixed: vendor fix RHSA-2024:1367
  • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) perf 4.18.0-193.133.1.el8_2, kernel 4.18.0-193.133.1.el8_2, bpftool 4.18.0-193.133.1.el8_2, kernel-core 4.18.0-193.133.1.el8_2, kernel-tools 4.18.0-193.133.1.el8_2, python3-perf 4.18.0-193.133.1.el8_2, +9 more
    fixed: vendor fix RHSA-2024:2006
  • Red Hat Enterprise Linux BaseOS E4S (v.8.4) perf 4.18.0-305.125.1.el8_4, kernel 4.18.0-305.125.1.el8_4, bpftool 4.18.0-305.125.1.el8_4, kernel-core 4.18.0-305.125.1.el8_4, kernel-tools 4.18.0-305.125.1.el8_4, python3-perf 4.18.0-305.125.1.el8_4, +9 more
    fixed: vendor fix RHSA-2024:1367
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) perf 4.18.0-372.95.1.el8_6, kernel 4.18.0-372.95.1.el8_6, bpftool 4.18.0-372.95.1.el8_6, kernel-core 4.18.0-372.95.1.el8_6, kernel-tools 4.18.0-372.95.1.el8_6, python3-perf 4.18.0-372.95.1.el8_6, +15 more
    fixed: vendor fix RHSA-2024:1188
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.51.1.el8_8, kernel 4.18.0-477.51.1.el8_8, bpftool 4.18.0-477.51.1.el8_8, kernel-core 4.18.0-477.51.1.el8_8, kernel-tools 4.18.0-477.51.1.el8_8, python3-perf 4.18.0-477.51.1.el8_8, +15 more
    fixed: vendor fix RHSA-2024:1404
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0) kernel 5.14.0-70.93.2.el9_0, bpftool 5.14.0-70.93.2.el9_0, kernel-core 5.14.0-70.93.2.el9_0, kernel-tools 5.14.0-70.93.2.el9_0, python3-perf 5.14.0-70.93.2.el9_0, kernel-modules 5.14.0-70.93.2.el9_0, +14 more
    fixed: vendor fix RHSA-2024:1250
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.52.1.el9_2, kernel 5.14.0-284.52.1.el9_2, kernel-64k 5.14.0-284.52.1.el9_2, kernel-core 5.14.0-284.52.1.el9_2, kernel-tools 5.14.0-284.52.1.el9_2, python3-perf 5.14.0-284.52.1.el9_2, +28 more
    fixed: vendor fix RHSA-2024:0723
  • Red Hat Enterprise Linux BaseOS TUS (v. 8.2) perf 4.18.0-193.133.1.el8_2, kernel 4.18.0-193.133.1.el8_2, bpftool 4.18.0-193.133.1.el8_2, kernel-core 4.18.0-193.133.1.el8_2, kernel-tools 4.18.0-193.133.1.el8_2, python3-perf 4.18.0-193.133.1.el8_2, +8 more
    fixed: vendor fix RHSA-2024:2006
  • Red Hat Enterprise Linux BaseOS TUS (v.8.4) perf 4.18.0-305.125.1.el8_4, kernel 4.18.0-305.125.1.el8_4, bpftool 4.18.0-305.125.1.el8_4, kernel-core 4.18.0-305.125.1.el8_4, kernel-tools 4.18.0-305.125.1.el8_4, python3-perf 4.18.0-305.125.1.el8_4, +8 more
    fixed: vendor fix RHSA-2024:1367
  • Red Hat Enterprise Linux NFV TUS (v.8.4) kernel-rt 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-kvm 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-core 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-modules 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-debug-kvm 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-debug-core 4.18.0-305.125.1.rt7.201.el8_4, +4 more
    fixed: vendor fix RHSA-2024:1382
  • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-core 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-modules 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-debug-core 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-debug-modules 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-modules-extra 5.14.0-70.93.1.rt21.165.el9_0, +2 more
    fixed: vendor fix RHSA-2024:1306
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-core 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-modules 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-debug-core 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-modules-core 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-debug-modules 5.14.0-284.52.1.rt14.337.el9_2, +4 more
    fixed: vendor fix RHSA-2024:0725
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-kvm 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-core 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-modules 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-debug-kvm 5.14.0-70.93.1.rt21.165.el9_0, kernel-rt-debug-core 5.14.0-70.93.1.rt21.165.el9_0, +4 more
    fixed: vendor fix RHSA-2024:1306
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-kvm 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-core 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-modules 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-debug-kvm 5.14.0-284.52.1.rt14.337.el9_2, kernel-rt-debug-core 5.14.0-284.52.1.rt14.337.el9_2, +6 more
    fixed: vendor fix RHSA-2024:0725
  • Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) kernel-rt 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-kvm 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-core 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-modules 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-debug-kvm 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-debug-core 4.18.0-193.133.1.rt13.184.el8_2, +4 more Red Hat Enterprise Linux Real Time TUS (v. 8.2) kernel-rt 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-core 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-modules 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-debug-core 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-debug-modules 4.18.0-193.133.1.rt13.184.el8_2, kernel-rt-modules-extra 4.18.0-193.133.1.rt13.184.el8_2, +2 more
    fixed: vendor fix RHSA-2024:2008
  • Red Hat Enterprise Linux RT TUS (v.8.4) kernel-rt 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-core 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-modules 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-debug-core 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-debug-modules 4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-modules-extra 4.18.0-305.125.1.rt7.201.el8_4, +2 more
    fixed: vendor fix RHSA-2024:1382
  • Red Hat Virtualization 4 Hypervisor for RHEL 8 perf 4.18.0-372.95.1.el8_6, kernel-debuginfo-common-x86_64 4.18.0-372.95.1.el8_6
    fixed: vendor fix RHSA-2024:1188

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected products

  • 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 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 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.2 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 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.