CVE-2019-9503

HIGHNVD 7.98.3▲
EchelonGraph scoreMEDIUM confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.9; sources differ by 0.4.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.9
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 7.9Exploit: NoneExposed: 0

A fix is available — apply it.

The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d04039fafa34a9f is vulnerable to a frame validation bypass. If the brcmfmac driver receives a firmware event frame from a remote source, the is_wlc_event_frame function will cause this frame to be discarded and unprocessed. If the driver receives the firmware event frame from the host, the appropriate handler is called. This frame validation can be bypassed if the bus used is USB (for instance by a wifi dongle). This can allow firmware event frames from a remote source to be processed. In the worst case scenario, by sending specially-crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.

CVSS v3
7.9
EG Score
8.3(medium)
EPSS
87.1%
KEV
Not listed

Published

January 16, 2020

Last Modified

November 21, 2024

References (14)

Vendor Advisories for CVE-2019-9503(3)

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

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-virtual-hwe-16.04-edge (4.15.0.50.52) @ bionic2026-05-27ubuntu
ubuntulinux-image-4.18.0-1012-kvm (4.18.0-1012.12) @ cosmic2026-05-27ubuntu
ubuntulinux-image-virtual-hwe-16.04 (4.15.0.50.71) @ xenial2026-05-27ubuntu
ubuntulinux-image-virtual-lts-xenial (4.4.0.157.165) @ xenial2026-05-27ubuntu
ubuntulinux-image-virtual-lts-xenial (4.4.0.159.167) @ xenial2026-05-27ubuntu
ubuntulinux-image-virtual-hwe-18.04 (4.18.0.20.70) @ bionic2026-05-27ubuntu
ubuntulinux-image-5.0.0-1006-azure (5.0.0-1006.6) @ disco2026-05-27ubuntu
redhatkernel-0:3.10.0-1062.26.1.el72020-06-11redhat
redhatkernel-rt-0:3.10.0-1127.rt56.1093.el72020-03-31redhat
redhatkernel-0:3.10.0-1127.el72020-03-31redhat
redhatkernel-0:4.18.0-80.11.1.el8_02019-09-12redhat
redhatkernel-rt-0:4.18.0-80.11.1.rt9.156.el8_02019-09-12redhat

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

(9)

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 13× in last 7d / 45× 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. 2026-07-22 22:30 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
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  6. 2026-07-19 21:18 UTCOSV refresh
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  6. 2026-07-02 12:02 UTCOSV refresh
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  36. 2026-06-14 10:43 UTCOSV refresh
  37. 2026-06-13 22:58 UTCEPSS rescore
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  68. 2026-05-27 08:57 UTCEG score recompute
  69. 2026-05-27 08:57 UTCVendor advisory
  70. 2026-05-27 08:57 UTCGHSA enrichment
  71. 2026-05-26 13:42 UTCEPSS rescore
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  75. 2026-05-24 16:47 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2019-9503?
CVE-2019-9503 is a high vulnerability published on January 16, 2020. The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d04039fafa34a9f is vulnerable to a frame validation bypass. If the brcmfmac driver receives a firmware event frame from a remote source, the iswlcevent_frame function will cause this frame to be discarded and unprocessed. If…
When was CVE-2019-9503 disclosed?
CVE-2019-9503 was first published in the National Vulnerability Database on January 16, 2020, 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-2019-9503 actively exploited?
CVE-2019-9503 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-9503?
CVE-2019-9503 has a CVSS v3 base score of 7.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.3.
How do I remediate CVE-2019-9503?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-9503, 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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