CVE-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 boundaries, leading to a crash or information disclosure.

CVSS 3.1

6.0CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-25)

CWE

CWE-125

Published

2023-10-09

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• fedoraproject:fedora
• linux:linux_kernel
• redhat:enterprise_linux

References

• https://access.redhat.com/errata/RHSA-2024:2950
• https://access.redhat.com/errata/RHSA-2024:3138
• https://access.redhat.com/security/cve/CVE-2023-39192
• https://bugzilla.redhat.com/show_bug.cgi?id=2226784
• https://www.zerodayinitiative.com/advisories/ZDI-CAN-18408/

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