CVE-2023-39191 Kernel: ebpf: insufficient stack type checks in dynptr

What is CVE-2023-39191?

CVE-2023-39191 is a high-severity vulnerability in Fedoraproject Fedora, published on 4 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An improper input validation flaw was found in the eBPF subsystem in the Linux kernel. The issue occurs due to a lack of proper validation of dynamic pointers within user-supplied eBPF programs prior to executing them. This may allow an attacker with CAP_BPF privileges to escalate privileges and execute arbitrary code in the context of the kernel.

Weakness: CWE-20

Which versions are affected by CVE-2023-39191?

It affects 3 products.

Products include Fedoraproject Fedora, Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2023-39191?

Apply the vendor's patch.

Is CVE-2023-39191 being exploited?

There is no known exploitation of CVE-2023-39191 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-31150, BELL-CVE-2023-39191, DEBIAN-CVE-2023-39191, GHSA-gxg7-pxwf-9r28, ROOT-OS-DEBIAN-12-CVE-2023-39191, UBUNTU-CVE-2023-39191.