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Findings

CVE-2023-39192

A flaw was found in the Netfilter subsystem in the Linux kernel.

Published Oct 9, 2023 · updated Oct 15, 2026 · linux linux kernel

A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundaries, leading to a crash or information disclosure.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 9, 2023 · NIST NVD

    Detected

    A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundaries, leading to a crash or information disclosure.

  2. Oct 15, 2026 · NIST NVD

    Updated

    A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundaries, leading to a crash or information disclosure.

Affected

  • cpe fedoraproject/fedora38
  • cpe linux/linux kernelversion unspecified
  • cpe redhat/enterprise linux8.0

Sources

  • CVE.orgCVE-2023-39192

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2023-39192

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDCVE-2023-39192

    A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundarie

    nvd.nist.gov

References