CVE-2023-4459

MEDIUMNVD 5.56.5▲
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2023-08-21. NVD baseline CVSS 5.5; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

A NULL pointer dereference flaw was found in vmxnet3_rq_cleanup in drivers/net/vmxnet3/vmxnet3_drv.c in the networking sub-component in vmxnet3 in the Linux Kernel. This issue may allow a local attacker with normal user privilege to cause a denial of service due to a missing sanity check during cleanup.

CVSS v3
5.5
EG Score
6.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

August 21, 2023

Last Modified

June 17, 2026

References (20)

Vendor Advisories for CVE-2023-4459(7)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-lts-xenial (4.4.0.245.251) @ xenial2026-05-24ubuntu
redhatkernel-rt-0:4.18.0-193.133.1.rt13.184.el8_22024-04-23redhat
redhatkernel-0:4.18.0-193.133.1.el8_22024-04-23redhat
redhatkernel-0:4.18.0-305.125.1.el8_42024-03-19redhat
redhatkernel-rt-0:4.18.0-305.125.1.rt7.201.el8_42024-03-19redhat
redhatkernel-rt-0:5.14.0-70.93.1.rt21.165.el9_02024-03-13redhat
redhatkernel-0:5.14.0-70.93.2.el9_02024-03-12redhat
redhatkernel-0:4.18.0-372.87.1.el8_62024-01-25redhat

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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (13 versions)5.10.120-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.17.11-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.17.11-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.17.11-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

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 / 35× 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 160 total refreshes for this CVE.

  1. 2026-09-07 15:59 UTCEPSS rescore
  2. 2026-09-06 13:46 UTCEPSS rescore
  3. 2026-09-06 13:45 UTCEPSS rescore
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  7. 2026-09-03 20:29 UTCOSV refresh
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  1. 2026-08-17 09:38 UTCOSV refresh
  2. 2026-08-16 14:54 UTCEPSS rescore
  3. 2026-08-16 02:12 UTCEPSS rescore
  4. 2026-08-15 01:28 UTCEPSS rescore
  5. 2026-08-13 21:58 UTCEPSS rescore
  6. 2026-08-12 13:49 UTCEPSS rescore
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  8. 2026-08-10 23:57 UTCEPSS rescore
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  26. 2026-07-28 15:34 UTCEPSS rescore
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  34. 2026-07-23 02:27 UTCEG score recompute
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  36. 2026-07-22 14:06 UTCEPSS rescore
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  40. 2026-07-19 14:29 UTCEPSS rescore
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  45. 2026-07-16 17:01 UTCEPSS rescore
  46. 2026-07-15 16:56 UTCEPSS rescore
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  48. 2026-07-15 11:49 UTCOSV refresh
  49. 2026-07-15 01:59 UTCEPSS rescore
  50. 2026-07-15 01:59 UTCEPSS rescore
  51. 2026-07-13 22:28 UTCEPSS rescore
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  67. 2026-07-02 16:59 UTCEPSS rescore
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  69. 2026-06-30 23:21 UTCEPSS rescore
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  74. 2026-06-28 04:55 UTCEPSS rescore
  75. 2026-06-27 12:04 UTCOSV refresh

Frequently asked(5)

What is CVE-2023-4459?
CVE-2023-4459 is a medium vulnerability published on August 21, 2023. A NULL pointer dereference flaw was found in vmxnet3rqcleanup in drivers/net/vmxnet3/vmxnet3_drv.c in the networking sub-component in vmxnet3 in the Linux Kernel. This issue may allow a local attacker with normal user privilege to cause a denial of service due to a missing sanity check during…
When was CVE-2023-4459 disclosed?
CVE-2023-4459 was first published in the National Vulnerability Database on August 21, 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-2023-4459 actively exploited?
CVE-2023-4459 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 83.8% of all scored CVEs.
What is the CVSS score of CVE-2023-4459?
CVE-2023-4459 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.5.
How do I remediate CVE-2023-4459?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-4459, 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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