high
8.2
CWE
20
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2023-39191: Linux Kernel eBPF Improper Input Validation Privilege Escalation Vulnerability

First published: Wed Jul 26 2023(Updated: )

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.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<6.3
Fedoraproject Fedora=38
Redhat Enterprise Linux=9.0

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=2226783

Remedy

https://www.zerodayinitiative.com/advisories/ZDI-CAN-19399/

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2023-39191.

  • What is the title of this vulnerability?

    The title of this vulnerability is Linux Kernel eBPF Improper Input Validation Privilege Escalation Vulnerability.

  • What is the severity of CVE-2023-39191?

    The severity of CVE-2023-39191 is high with a severity value of 8.2.

  • How can this vulnerability be exploited?

    This vulnerability can be exploited by local attackers who have obtained the ability to execute high-privileged code on the target system.

  • Are there any known references related to this vulnerability?

    Yes, there are some references related to this vulnerability. You can find them at the following links: [Link 1](https://lwn.net/Articles/895885), [Link 2](https://lore.kernel.org/all/20230121002241.2113993-1-memxor@gmail.com/), [Link 3](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2242087).

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