CVE-2023-7192

Kernel: refcount leak in ctnetlink_create_conntrack()

MEDIUM
4.4
CVSS Score
Published: January 2, 2024 at 07:02 PM UTC
Updated: June 17, 2026 at 06:52 AM UTC
2 products affected across 2 vendorsLinux KernelEnterprise Linux

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Severity
MEDIUM4.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 6.3
Affected range stops below 6.3, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 0:4.18.0-193.133.1.el8_2 (unaffected)
Vendor states this is fixed in 0:4.18.0-193.133.1.rt13.184.el8_2 (unaffected)
Vendor states this is fixed in 0:4.18.0-305.125.1.el8_4 (unaffected)
Vendor states this is fixed in 0:4.18.0-305.125.1.rt7.201.el8_4 (unaffected)
Vendor states this is fixed in 0:4.18.0-372.95.1.el8_6 (unaffected)
Vendor states this is fixed in 0:4.18.0-477.51.1.el8_8 (unaffected)
Vendor states this is fixed in 0:5.14.0-284.52.1.el9_2 (unaffected)
Vendor states this is fixed in 0:5.14.0-284.52.1.rt14.337.el9_2 (unaffected)
Vendor states this is fixed in 0:5.14.0-70.93.1.rt21.165.el9_0 (unaffected)
Vendor states this is fixed in 0:5.14.0-70.93.2.el9_0 (unaffected)
Vendor states this is fixed in 6 (unknown)
Vendor states this is fixed in 7 (unknown)

References (13)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-401

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