CVE-2023-4147

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-08-07. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

A use-after-free flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
43.1%
KEV
Not listed

Published

August 7, 2023

Last Modified

June 17, 2026

References (24)

Vendor Advisories for CVE-2023-4147(3)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:5.14.0-70.80.1.el9_02023-11-21redhat
redhatkernel-rt-0:5.14.0-70.80.1.rt21.151.el9_02023-11-21redhat
redhatkpatch-patch2023-11-21redhat
redhatkernel-rt-0:5.14.0-284.30.1.rt14.315.el9_22023-09-12redhat
redhatkernel-0:5.14.0-284.30.1.el9_22023-09-12redhat

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

(4)

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 12× in last 7d / 49× 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 105 total refreshes for this CVE.

  1. 2026-07-23 02:26 UTCEG score recompute
  2. 2026-07-22 23:12 UTCEG score recompute
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Frequently asked(5)

What is CVE-2023-4147?
CVE-2023-4147 is a high vulnerability published on August 7, 2023. A use-after-free flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTARULECHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.
When was CVE-2023-4147 disclosed?
CVE-2023-4147 was first published in the National Vulnerability Database on August 7, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-4147 actively exploited?
CVE-2023-4147 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-4147?
CVE-2023-4147 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-4147?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-4147, 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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