CVE-2018-18559

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 8.1Exploit: NoneExposed: 0

A fix is available — apply it.

In the Linux kernel through 4.19, a use-after-free can occur due to a race condition between fanout_add from setsockopt and bind on an AF_PACKET socket. This issue exists because of the 15fe076edea787807a7cdc168df832544b58eba6 incomplete fix for a race condition. The code mishandles a certain multithreaded case involving a packet_do_bind unregister action followed by a packet_notifier register action. Later, packet_release operates on only one of the two applicable linked lists. The attacker can achieve Program Counter control.

CVSS v3
8.1
EG Score
8.1(medium)
EPSS
83.7%
KEV
Not listed

Published

October 22, 2018

Last Modified

November 21, 2024

References (18)

Vendor Advisories for CVE-2018-18559(2)

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

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-alt-0:4.14.0-115.17.1.el7a2020-01-21redhat
redhatkernel-0:3.10.0-514.71.1.el72019-12-10redhat
redhatkernel-0:3.10.0-862.44.2.el72019-11-26redhat
redhatkernel-rt-1:3.10.0-693.47.2.rt56.641.el6rt2019-05-14redhat
redhatkernel-0:3.10.0-693.47.2.el72019-05-14redhat
redhatkernel-rt-0:3.10.0-957.5.1.rt56.916.el72019-01-29redhat
redhatkernel-0:3.10.0-957.5.1.el72019-01-29redhat

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(2)

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

Additional Vendor Advisories

(5)

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 11× in last 7d / 50× 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.

  1. 2026-07-16 16:59 UTCEPSS rescore
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  20. 2026-07-04 06:28 UTCEPSS rescore
  21. 2026-07-04 06:28 UTCEPSS rescore
  22. 2026-07-03 23:26 UTCOSV refresh
  23. 2026-07-02 16:54 UTCEPSS rescore
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  1. 2026-06-30 23:20 UTCEPSS rescore
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  29. 2026-06-15 11:13 UTCOSV refresh
  30. 2026-06-14 23:15 UTCEPSS rescore
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  59. 2026-05-28 01:47 UTCEG score recompute
  60. 2026-05-28 01:47 UTCVendor advisory
  61. 2026-05-28 01:47 UTCGHSA enrichment
  62. 2026-05-27 13:38 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2018-18559?
CVE-2018-18559 is a high vulnerability published on October 22, 2018. In the Linux kernel through 4.19, a use-after-free can occur due to a race condition between fanoutadd from setsockopt and bind on an AFPACKET socket. This issue exists because of the 15fe076edea787807a7cdc168df832544b58eba6 incomplete fix for a race condition. The code mishandles a certain…
When was CVE-2018-18559 disclosed?
CVE-2018-18559 was first published in the National Vulnerability Database on October 22, 2018, 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-2018-18559 actively exploited?
CVE-2018-18559 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 83.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-18559?
CVE-2018-18559 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2018-18559?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-18559, 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.

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