What’s Vulnerable › Vulnerabilities
CVE-2023-7192: Kernel: refcount leak in ctnetlink_create_conntrack()
- Severity: medium (CVSS 4.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-01-02 · updated 2026-06-17
- Weakness: CWE-401
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.
Affected products
- Linux kernel: before 6.3 — fixed in 6.3
- Red Hat Enterprise Linux: 8.0, 9.0
How to fix
Upgrade to a fixed version: Linux kernel 6.3. Check the vendor advisory for mitigations.
References
- https://access.redhat.com/errata/RHSA-2024:0723
- https://access.redhat.com/errata/RHSA-2024:0725
- https://access.redhat.com/errata/RHSA-2024:1188
- https://access.redhat.com/errata/RHSA-2024:1250
- https://access.redhat.com/errata/RHSA-2024:1306
- https://access.redhat.com/errata/RHSA-2024:1367
- https://access.redhat.com/errata/RHSA-2024:1382
- https://access.redhat.com/errata/RHSA-2024:1404
- https://access.redhat.com/errata/RHSA-2024:2006
- https://access.redhat.com/errata/RHSA-2024:2008
- https://access.redhat.com/security/cve/CVE-2023-7192
- https://bugzilla.redhat.com/show_bug.cgi?id=2256279
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