Vulnerability record/PUBLISHED/Published Oct 4, 2023 18:03:02 UTC

CVE-2023-39191

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.

Base score8.2/ 10

SeverityHighCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityHigh

Attack vectorLocalAV

Attack complexityLowAC

Privileges requiredHighPR

User interactionNoneUI

ScopeChangedS

Confidentiality impactHighC

Integrity impactHighI

Availability impactHighA

CVSS vector stringCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authorityredhat

Last updatedNov 7, 2026 11:32:43 UTC

PublishedOct 4, 2023 18:03:02 UTC

ReservedJul 25, 2023 16:01:14 UTC

Credits

Red Hat would like to thank Zero Day Initiative (ZDI) for reporting this issue.