CVE-2023-39191
HighAn 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.
CVSS 3.1 score
8.2
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness type
CWE-20CVE-2023-39191 is a Improper Input Validation vulnerability
What is Improper Input Validation?
The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. Learn more on MITRE CWE
References
The following references provide additional information about CVE-2023-39191 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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PatchKernel patch commithttps://bugzilla.redhat.com/show_bug.cgi?id=2226783
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PatchKernel patch commithttps://www.zerodayinitiative.com/advisories/ZDI-CAN-19399/
Frequently asked questions
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What is CVE-2023-39191?
CVE-2023-39191 is a High severity Linux kernel vulnerability with a CVSS score of 8.2 out of 10 , classified as an Improper Input Validation flaw (CWE-20) . CVE-2023-39191 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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What is the CVSS score for CVE-2023-39191?
CVE-2023-39191 has a CVSS score of 8.2 out of 10, rated High severity (CVSS 3.1). The vector string is
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H. -
Is there a patch available for CVE-2023-39191?
No patch is currently available for CVE-2023-39191. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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Is CVE-2023-39191 actively exploited?
No — CVE-2023-39191 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
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What is Improper Input Validation (CWE-20)?
The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. View CWE-20 on MITRE CWE →