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Low severity3.3NVD Advisory· Published May 28, 2021· Updated Jun 17, 2026

CVE-2021-20239

CVE-2021-20239

Description

A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

8
  • Linux/Kernelllm-fuzzy2 versions
    <5.4.92+ 1 more
    • (no CPE)range: <5.4.92
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: <5.4.92
  • Linux/BPF protocoldescription
  • osv-coords
    pkg:rpm/almalinux/kernel-tools-libs-devel
    Range: < 4.18.0-348.el8
  • Red Hat/Enterprise Linux Server3 versions
    cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  • Fedoraproject/Fedora
    cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

1

News mentions

0

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