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TI-2019-06939 Aliases CVE-2019-9503GHSA-6g85-84jx-q393

Broadcom brcmfmac driver is vulnerable to a frame validation bypass

Priority MEDIUM 42CWE-20Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 18 fixed, 3 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, Red Hat and Microsoft.

Summary

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.

Why it matters now

EPSS 0.03286 88th percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesMicrosoft: 1 updateRed Hat: 18 fixed, 3 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Broadcombrcmfmac WiFi drivercommit prior to a4176ec356c73a46c07c181c6d04039fafa34a9f—No fix listedCNA
  • brcmfmac WiFi driver VendorBroadcom Affected commit prior to a4176ec356c73a46c07c181c6d04039fafa34a9f Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:broadcom:brcmfmac_driver:-:*:*:*:*:*:*:*not specified by NVDVulnerableBroadcom
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:broadcom:brcmfmac_driver:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Broadcom
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 5 advisories

  • RHSA-2020:2522 Released 2020-06-11 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) bpftool-3.10.0-1062.26.1.el7, kernel-3.10.0-1062.26.1.el7, kernel-abi-whitelists-3.10.0-1062.26.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.26.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.7) bpftool-3.10.0-1062.26.1.el7, kernel-3.10.0-1062.26.1.el7, kernel-abi-whitelists-3.10.0-1062.26.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debug-devel-3.10.0-1062.26.1.el7, kernel-tools-libs-devel-3.10.0-1062.26.1.el7
  • RHSA-2020:1070 Released 2020-03-31 · Red Hat rating Moderate
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1127.rt56.1093.el7, kernel-rt-debug-3.10.0-1127.rt56.1093.el7, kernel-rt-debug-devel-3.10.0-1127.rt56.1093.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1127.rt56.1093.el7, kernel-rt-debug-3.10.0-1127.rt56.1093.el7, kernel-rt-debug-devel-3.10.0-1127.rt56.1093.el7 +7
  • RHSA-2020:1016 Released 2020-03-31 · Red Hat rating Moderate
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1127.el7, kernel-3.10.0-1127.el7, kernel-abi-whitelists-3.10.0-1127.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1127.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) bpftool-3.10.0-1127.el7, kernel-3.10.0-1127.el7, kernel-abi-whitelists-3.10.0-1127.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1127.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1127.el7, kernel-3.10.0-1127.el7, kernel-abi-whitelists-3.10.0-1127.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1127.el7, kernel-tools-libs-devel-3.10.0-1127.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1127.el7, kernel-3.10.0-1127.el7, kernel-abi-whitelists-3.10.0-1127.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1127.el7
Show 2 more Red Hat advisories
  • RHSA-2019:2741 Released 2019-09-12 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-core-4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-4.18.0-80.11.1.rt9.156.el8_0 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-core-4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-4.18.0-80.11.1.rt9.156.el8_0 +9
  • RHSA-2019:2703 Released 2019-09-12 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-80.11.1.el8_0
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-80.11.1.el8_0, kernel-4.18.0-80.11.1.el8_0, kernel-abi-whitelists-4.18.0-80.11.1.el8_0 +21

Microsoft 1 update

  • ADV190017 Released 2019-06-11
    Microsoft HoloLens Remote Code Execution Vulnerabilities

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Enterprise MRG 2AffectedNo fix planned: Out of support scope
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2019:2703
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2019:2703
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux Real Time (v. 8)Fixed RHSA-2019:2741
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2019:2741
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux Server Optional EUS (v. 7.7)Fixed RHSA-2020:2522
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:1016
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2020:1070
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2020:1070
Not affected: 1 product
  • Red Hat Enterprise Linux 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-9503
  2. 2026-10-03 Alias added: GHSA-6g85-84jx-q393

References

Patch 1

Advisory 6

  • TI-2019-06936 Broadcom brcmfmac driver is vulnerable to a heap buffer overflow CVSS 3.1HIGH 8.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences