CVE-2023-42756
MEDIUMCVSS 4.7/10EPSS 0.28%
Last modified
CVE-2023-42756 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. A flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`. EPSS estimates a 0.28% chance of exploitation in the next 30 days.
Description
A flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`. This issue may allow a local user to crash the system.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | < 6.6 | — |
| Linux | Linux Kernel | 6.6 | Rc1 |
| Redhat | Enterprise Linux | 9.0 | — |
| Debian | Debian Linux | 10.0 | — |
| Fedoraproject | Fedora | 37 | — |
| Fedoraproject | Fedora | 38 | — |
| Fedoraproject | Fedora | 39 | — |
References
- https://access.redhat.com/security/cve/CVE-2023-42756Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2239848Exploit, Issue Tracking, Patch, Third Party Advisory
- https://seclists.org/oss-sec/2023/q3/242Exploit, Mailing List, Patch, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-42756Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2239848Exploit, Issue Tracking, Patch, Third Party Advisory
- https://seclists.org/oss-sec/2023/q3/242Exploit, Mailing List, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-42756?
A flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`. This issue may allow a local user to crash the system.
How severe is CVE-2023-42756?
CVE-2023-42756 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.
How do I fix CVE-2023-42756?
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.
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Are you affected by CVE-2023-42756?
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