CVE-2023-7192
Kernel: refcount leak in ctnetlink_create_conntrack()
No known exploitation. EPSS puts it in the 20th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.3% chance of exploitation activity in the next 30 days, which ranks it in the 20th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
6 events over 905 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availableworkaround available, record updated
- Publishedweakness classified
Affected products
- Red Hat Enterprise Linux 8.2 Advanced Update SupportOperating Systems / linux-distro
- Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceOperating Systems / linux-distro
- Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsOperating Systems / linux-distro
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportOperating Systems / linux-distro
- Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceOperating Systems / linux-distro
- Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsOperating Systems / linux-distro
- Red Hat Enterprise Linux 8.6 Extended Update SupportOperating Systems / linux-distro
- Red Hat Enterprise Linux 8.8 Extended Update SupportOperating Systems / linux-distro
And 8 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Scored 5.5 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity NoneNo integrity impact
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
Sources
References in the record
- cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-7192&
- git.kernel.org/linus/ac4893980bbe79ce383daf9a0885666a30fe4c83&
- kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.308&
And 21 more references. See all after sign-in
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