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-2023-39193
Red Hat Red Hat Enterprise Linux 8 — Kernel: netfilter: xtables sctp out-of-bounds read in match_flags()
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L H N U H N H 6.0 .0042 35.2 —
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 9 unspecified 0:5.14.0-427.13.1.el9_4
Red Hat Enterprise Linux 9 unspecified 0:5.14.0-427.13.1.el9_4
Red Hat Enterprise Linux 6 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 9 unspecified —
TIMELINE
Jul 25 Reserved by redhat
Oct 9 Published (CNA: redhat)
Oct 15 RESCORED — CVE-2023-39193 (Red Hat Enterprise Linux 8). CVSS 6.1 → 6 (NVD).
Description
A flaw was found in the Netfilter subsystem in the Linux kernel. The sctp_mt_check did not validate the flag_count field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, 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-2023-39193 (Red Hat Enterprise Linux 8). CVSS 6.1 → 6 (NVD). |
Affected
Affected products and packages — 8 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 9 | — | — | 0:5.14.0-427.13.1.el9_4 |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | 0:5.14.0-427.13.1.el9_4 |
| 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 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-39193 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.
