CVE-2023-39189
MEDIUMCVSS 6/10EPSS 0.41%
Last modified
CVE-2023-39189 is a medium-severity vulnerability rated 6/10 on the CVSS scale. A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. EPSS estimates a 0.41% chance of exploitation in the next 30 days.
Description
A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 6.6 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
| Fedoraproject | Fedora | 38 |
References
- https://access.redhat.com/security/cve/CVE-2023-39189Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2226777Issue Tracking, Patch, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-39189Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2226777Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-39189?
A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.
How severe is CVE-2023-39189?
CVE-2023-39189 has a CVSS score of 6/10 (MEDIUM severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.
How do I fix CVE-2023-39189?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2023-39189?
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Scan your code nowSource: NVD / NIST