CVE-2023-39191

Kernel: ebpf: insufficient stack type checks in dynptr

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.

Category

8.2
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2023:6583 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2024:0381 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2024:0439 vendor advisory third party advisory
https://access.redhat.com/errata/RHSA-2024:0448 vendor advisory third party advisory
https://access.redhat.com/security/cve/CVE-2023-39191 vdb entry third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2226783 issue tracking patch third party advisory
https://www.zerodayinitiative.com/advisories/ZDI-CAN-19399/ vdb entry patch third party advisory

Frequently Asked Questions

What is the severity of CVE-2023-39191?
CVE-2023-39191 has been scored as a high severity vulnerability.
How to fix CVE-2023-39191?
To fix CVE-2023-39191, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-39191 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-39191 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-39191?
CVE-2023-39191 affects Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9.
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