CVE-2023-7192: Kernel: refcount leak in ctnetlink_create_conntrack()

Modified

AliasesUBUNTU-CVE-2023-7192USN-6645-1DEBIAN-CVE-2023-7192

Published 02-01-2024Last modified 20-11-2025

Vulnerability summary

CVE-2023-7192 is a medium (CVSS 5.5) vulnerability in linux linux_kernel. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 22.5% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.5/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.30%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

02-01-2024
PublishedVulnerability first disclosed.
20-11-2025
Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

v3.15.5

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.30% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-401Missing Release of Memory after Effective LifetimeThe product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu99 products

linux< 4.4.0-251.285 | < 4.15.0-222.233 | < 5.4.0-152.169 | < 5.15.0-79.86 | < 3.13.0-196.247
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 4.4.0-1128.134 | < 4.4.0-1166.181 | < 4.15.0-1165.178 | < 5.4.0-1104.112 | < 5.15.0-1042.47
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.15< 5.15.0-1041.46~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1104.112~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2104.110 | All versions (No fix recorded) | < 5.4.0-1104.112+fips1
linux-aws-hwe< 4.15.0-1165.178~16.04.1
linux-azure< 4.15.0-1174.189~14.04.1 | < 4.15.0-1174.189~16.04.1 | All versions (No fix recorded) | < 5.4.0-1110.116 | < 5.15.0-1045.52
linux-azure-4.15< 4.15.0-1174.189
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1045.52~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1110.116~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1044.51.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fipsAll versions (No fix recorded) | < 5.4.0-1110.116+fips1
linux-bluefield< 5.4.0-1065.71 | < 5.15.0-1022.24
linux-fipsAll versions (No fix recorded) | < 5.4.0-1079.88
linux-gcp< 4.15.0-1159.176~16.04.1 | All versions (No fix recorded) | < 5.4.0-1107.116 | < 5.15.0-1039.47
linux-gcp-4.15< 4.15.0-1159.176
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1039.47~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1107.116~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2067.72 | All versions (No fix recorded) | < 5.4.0-1107.116+fips1
linux-gkeAll versions (No fix recorded) | < 5.15.0-1039.44
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1071.75 | < 5.15.0-1025.30
linux-gkeop-5.15< 5.15.0-1025.30~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-222.233~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-79.86~20.04.2
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-152.169~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1051.56 | < 5.15.0-1035.38
linux-ibm-5.15< 5.15.0-1036.39~20.04.1
linux-ibm-5.4< 5.4.0-1051.56~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1036.38
linux-intel-iotg< 5.15.0-1037.42
linux-intel-iotg-5.15< 5.15.0-1037.42~20.04.1
linux-iot< 5.4.0-1017.18
linux-kvm< 4.4.0-1129.139 | < 4.15.0-1149.154 | < 5.4.0-1093.99 | < 5.15.0-1039.44
linux-lowlatency< 5.15.0-79.88
linux-lowlatency-hwe-5.15< 5.15.0-79.88~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lts-xenial< 4.4.0-251.285~14.04.1
linux-nvidia< 5.15.0-1030.30
linux-nvidia-tegra< 5.15.0-1016.16
linux-nvidia-tegra-5.15< 5.15.0-1016.16~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1002.2
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1< 6.1.0-1009.9
linux-oracle< 4.15.0-1128.139~16.04.1 | < 4.15.0-1128.139 | < 5.4.0-1103.112 | < 5.15.0-1040.46
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1040.46~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1103.112~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1088.99 | < 5.15.0-1035.38
linux-raspi-5.4< 5.4.0-1088.99~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1043.48
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1038.42~20.04.2
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)
linux-xilinx-zynqmp< 5.4.0-1024.28 | < 5.15.0-1025.29