CVE-2023-4206
CVSS 3.1 Score 7.8 of 10 (high)
Details
Summary
CVE-2023-4206 is a use-after-free vulnerability impacting the Linux kernel's net/sched: cls_route component. This issue can be leveraged for local privilege escalation. During the process of route4_change(), the entire tcf_result struct is copied into a new filter instance, causing problems when updating filters bound to classes. When tcf_unbind_filter() is called on the old instance in the success path, the filter_cnt of the referenced class is decreased, allowing it to be deleted, leading to a use-after-free situation. It is strongly advised to upgrade to the commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8 to mitigate this vulnerability.
Prevent cyber attacks with Recorded Future by prioritizing and patching critical vulnerabilities being exploited by threat actors targeting your industry. Book your demo to learn more.
Advisories, Assessments, and Mitigations
Prioritize, Pinpoint, and Act to Prevent Vulnerability Exploits with Recorded Future
- Gain complete coverage of your cyber, third party, and physical attack surface
- Proactively mitigate threats before they turn into costly attacks
- Make fast, effective, data-driven decisions