CVE-2023-39193

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
—
EPSS
34.0%
KEV
Not listed

Published

October 9, 2023

Last Modified

November 21, 2024

References (13)

Vendor Advisories for CVE-2023-39193(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(20)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-lts-xenial (4.4.0.248.254) @ xenial2026-05-24ubuntu
ubuntulinux-tools-gke (4.15.0.1157.147) @ xenial2026-05-24ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.169.187~18.04.137) @ bionic2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.91.88) @ jammy2026-05-24ubuntu
ubuntulinux-tools-gkeop-5.4 (5.4.0.1083.81) @ focal2026-05-24ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1100.130) @ focal2026-05-24ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.91.92) @ jammy2026-05-24ubuntu
ubuntulinux-tools-gkeop-5.15 (5.15.0.1034.33) @ jammy2026-05-24ubuntu
ubuntulinux-tools-oracle-lts-20.04 (5.4.0.1115.108) @ focal2026-05-24ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1046.52~20.04.36) @ focal2026-05-24ubuntu
ubuntulinux-tools-kvm (6.2.0.1018.18) @ lunar2026-05-24ubuntu
ubuntulinux-tools-gcp (6.2.0.1021.23~22.04.1) @ jammy2026-05-24ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1046.46) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04 (6.2.0.39.40~22.04.16) @ jammy2026-05-24ubuntu
ubuntulinux-tools-iot (5.4.0.1028.26) @ focal2026-05-24ubuntu
ubuntulinux-tools-azure-fde (6.2.0.1018.18~22.04.1.15) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.220.4) @ xenial2026-05-24ubuntu
redhatkernel-rt-0:4.18.0-553.rt7.342.el8_102024-05-22redhat
redhatkernel-0:4.18.0-553.el8_102024-05-22redhat
redhatkernel-0:5.14.0-427.13.1.el9_42024-04-30redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(19)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 102 total refreshes for this CVE.

  1. 2026-07-22 23:12 UTCEG score recompute▲ 1.00
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Frequently asked(5)

What is CVE-2023-39193?
CVE-2023-39193 is a medium vulnerability published on October 9, 2023. A flaw was found in the Netfilter subsystem in the Linux kernel. The sctpmtcheck did not validate the flagcount field. This flaw allows a local privileged (CAPNET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.
When was CVE-2023-39193 disclosed?
CVE-2023-39193 was first published in the National Vulnerability Database on October 9, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-39193 actively exploited?
CVE-2023-39193 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-39193?
CVE-2023-39193 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2023-39193?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-39193, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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