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.
Key facts
- CVSS score
- 8.2 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H- Weakness (CWE)
- CWE-20
- EPSS score
- 0.5% (44th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2023-42926)
- Published
- October 4, 2023
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2023-42926 in the EU Vulnerability Database. Last updated in EUVD on November 6, 2025.
View on the EU Vulnerability DatabaseAffected products
- fedoraproject / fedora
- linux / linux kernel
- redhat / enterprise linux
Certified products that may be affected
8 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux 9 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5445 - active
- Red Hat Enterprise Linux 9 libgcrypt - Red Hat, Inc. - FIPS 140 5366 - active
- Red Hat Enterprise Linux 9 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5034 - active
- Red Hat Enterprise Linux 9 NSS Cryptographic Module - Red Hat, Inc - FIPS 140 5022 - active
- Red Hat Enterprise Linux 9 gnutls - Red Hat, Inc. - FIPS 140 4846 - active
See all 8 in the Security Certifications Explorer.
References
- https://access.redhat.com/errata/RHSA-2023:6583(Third Party Advisory)
- https://access.redhat.com/errata/RHSA-2024:0381(Third Party Advisory)
- https://access.redhat.com/errata/RHSA-2024:0439(Third Party Advisory)
- https://access.redhat.com/errata/RHSA-2024:0448(Third Party Advisory)
- https://access.redhat.com/security/cve/CVE-2023-39191(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/(Patch, Third Party Advisory, VDB Entry)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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