No exploitation reportedFix available

CVE-2019-9503

No exploitation reported by the sources we read.

Published2020-01-16
WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2020-01-1621:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-9503?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-9503?format=csv
TAXII collection of exploited CVEs
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Versions per branch

NVD

Redhat enterprise linux

Branch	Affected	Fixed in	Source
6.0	= 6.0	no fix published	NVD
7.0	= 7.0	no fix published	NVD

Broadcom brcmfmac driver

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

git.kernel.orgPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.17.9read 2026-10-23
NVDCVSS 3.18.3read 2026-10-23
NVDCVSS 2.07.9read 2026-10-23
CNAweakness (CWE)CWE-20read 2026-10-23
NVDweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score3.3 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Published: 2020-01-16
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-9503?

Is CVE-2019-9503 actively exploited?

Active exploitation of CVE-2019-9503 has not been confirmed. Its EPSS score was 3.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-9503?

CVE-2019-9503 has a CVSS v3 base score of 8.3 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

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