Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2023-39192
Red Hat Red Hat Enterprise Linux 8 — Kernel: netfilter: xtables out-of-bounds read in u32_match_it()
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L H N U H N H 6.0 .0040 32.6 —
AFFECTED
Product Versions Fixed
Red Hat Enterprise Linux 8 unspecified 0:4.18.0-553.rt7.342.el8_10
Red Hat Enterprise Linux 8 unspecified 0:4.18.0-553.el8_10
Red Hat Enterprise Linux 6 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 9 unspecified —
Red Hat Enterprise Linux 9 unspecified —
TIMELINE
Jul 25 Reserved by redhat
Oct 9 Published (CNA: redhat)
Oct 15 RESCORED — CVE-2023-39192 (Red Hat Enterprise Linux 8). CVSS 6.7 → 6 (NVD).
Description
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| July 25, 2023 | Reserved | Reserved by redhat |
| October 9, 2023 | Published | Published (CNA: redhat) |
| October 15, 2026 | RESCORED | RESCORED — CVE-2023-39192 (Red Hat Enterprise Linux 8). CVSS 6.7 → 6 (NVD). |
Affected
Affected products and packages — 7 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Enterprise Linux 8 | — | — | 0:4.18.0-553.rt7.342.el8_10 |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | 0:4.18.0-553.el8_10 |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-39192 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
