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Fencer Vulns
high 7.9

CVE-2019-9500 json

Broadcom brcmfmac driver is vulnerable to a heap buffer overflow

published 2020-01-16 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-18874

cvss
7.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.9%
EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

The Broadcom brcmfmac WiFi driver prior to commit 1b5e2423164b3670e8bc9174e4762d297990deff is vulnerable to a heap buffer overflow. If the Wake-up on Wireless LAN functionality is configured, a malicious event frame can be constructed to trigger an heap buffer overflow in the brcmf_wowl_nd_results function. This vulnerability can be exploited with compromised chipsets to compromise the host, or when used in combination with CVE-2019-9503, can be used remotely. 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.

Patch / fix

  • linux linux_kernel 4.9.181, 4.14.123, 4.19.47, 5.0.20
  • linux Debian 14, Debian 13, Debian 12 4.19.37-4

debian advisories DEBIAN-CVE-2019-9500

  • linux Ubuntu 18.04 LTS 4.15.0-50.54
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1039.41
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1032.34~16.04.1
  • linux-gcp Ubuntu 18.04 LTS 4.15.0-1032.34
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-50.54~16.04.1
  • linux-hwe Ubuntu 18.04 LTS 4.18.0-20.21~18.04.1
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1034.34
  • linux-oem Ubuntu 18.04 LTS 4.15.0-1038.43

ubuntu advisories UBUNTU-CVE-2019-9500

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 8 4.18.0-80.11.1.el8_0
  • perf RHEL 8 4.18.0-80.11.1.el8_0
  • bpftool RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-core RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-tools RHEL 8 4.18.0-80.11.1.el8_0
  • python3-perf RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-modules RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-zfcpdump RHEL 8 4.18.0-80.11.1.el8_0

red hat advisories RHSA-2019:2703RHSA-2019:3217RHSA-2019:4171RHSA-2019:4168RHSA-2019:2600RHSA-2019:2945

  • kernel-source-rt Real Time Module 15 SP1 4.12.14-14.8.1
  • kernel-rt Real Time Module 15 SP1 4.12.14-14.8.1
  • kernel-syms-rt Real Time Module 15 SP1 4.12.14-14.8.1
  • kernel-rt_debug Real Time Module 15 SP1 4.12.14-14.8.1
  • kernel-syms SLE Module for Development Tools 15 SP1 4.12.14-197.4.1
  • kernel-source SLE Module for Development Tools 15 SP1, SLE Module for Basesystem 15 SP1 4.12.14-197.4.1
  • kernel-default SLE Workstation Extension 15 SP1, SLE Module for Legacy 15 SP1, SLE Module for Basesystem 15 SP1 +2 more 4.12.14-197.4.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP1 4.12.14-197.4.1

suse advisories SUSE-SU-2019:2430-1SUSE-SU-2019:1550-1SUSE-SU-2019:1244-1SUSE-SU-2019:1242-1SUSE-SU-2019:1241-1SUSE-SU-2019:1240-1

  • kernel-source openSUSE Tumbleweed 5.14.6-1.4
  • kernel-source openSUSE Tumbleweed 6.6.17-1.1
  • kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.4.1
  • kernel-obs-qa openSUSE Leap 15.1 4.12.14-lp151.28.4.1
  • kernel-source openSUSE Leap 15.1 4.12.14-lp151.28.4.1
  • kernel-default openSUSE Leap 15.1 4.12.14-lp151.28.4.1
  • kernel-vanilla openSUSE Leap 15.1 4.12.14-lp151.28.4.1
  • kernel-kvmsmall openSUSE Leap 15.1 4.12.14-lp151.28.4.1

opensuse advisories openSUSE-SU-2024:10728-1openSUSE-SU-2024:13704-1openSUSE-SU-2019:1479-1openSUSE-SU-2019:1404-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-9500 updated cvss 6.5

kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results

  • Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-80.11.1.el8_0, kernel-debuginfo-common-aarch64 4.18.0-80.11.1.el8_0, kernel-debuginfo-common-ppc64le 4.18.0-80.11.1.el8_0 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-80.11.1.el8_0, kernel 4.18.0-80.11.1.el8_0, bpftool 4.18.0-80.11.1.el8_0, kernel-core 4.18.0-80.11.1.el8_0, kernel-tools 4.18.0-80.11.1.el8_0, python3-perf 4.18.0-80.11.1.el8_0, +15 more
    fixed: vendor fix RHSA-2019:2703
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-1062.1.1.el7, kernel 3.10.0-1062.1.1.el7, bpftool 3.10.0-1062.1.1.el7, python-perf 3.10.0-1062.1.1.el7, kernel-tools 3.10.0-1062.1.1.el7, kernel-tools-libs 3.10.0-1062.1.1.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.1.1.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-1062.1.1.el7, kernel 3.10.0-1062.1.1.el7, bpftool 3.10.0-1062.1.1.el7, python-perf 3.10.0-1062.1.1.el7, kernel-tools 3.10.0-1062.1.1.el7, kernel-tools-libs 3.10.0-1062.1.1.el7, +2 more
    fixed: vendor fix RHSA-2019:2600
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) perf 3.10.0-957.41.1.el7, kernel 3.10.0-957.41.1.el7, bpftool 3.10.0-957.41.1.el7, python-perf 3.10.0-957.41.1.el7, kernel-tools 3.10.0-957.41.1.el7, kernel-tools-libs 3.10.0-957.41.1.el7, +2 more
    fixed: vendor fix RHSA-2019:4168
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.1.1.el7
    fixed: vendor fix RHSA-2019:2600
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-debuginfo-common-x86_64 3.10.0-957.41.1.el7
    fixed: vendor fix RHSA-2019:4168
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) perf 4.14.0-115.14.1.el7a, kernel 4.14.0-115.14.1.el7a, kernel-alt 4.14.0-115.14.1.el7a, python-perf 4.14.0-115.14.1.el7a, kernel-tools 4.14.0-115.14.1.el7a, kernel-tools-libs 4.14.0-115.14.1.el7a, +3 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debuginfo-common-ppc64le 4.14.0-115.14.1.el7a
    fixed: vendor fix RHSA-2019:3217
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-1062.1.1.rt56.1024.el7, kernel-rt-kvm 3.10.0-1062.1.1.rt56.1024.el7, kernel-rt-trace 3.10.0-1062.1.1.rt56.1024.el7, kernel-rt-debug-kvm 3.10.0-1062.1.1.rt56.1024.el7, kernel-rt-trace-kvm 3.10.0-1062.1.1.rt56.1024.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1062.1.1.rt56.1024.el7
    fixed: vendor fix RHSA-2019:2609
show 9 more
  • 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-modules 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-core 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-modules 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-modules-extra 4.18.0-80.11.1.rt9.156.el8_0, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-kvm 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-modules 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-kvm 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-core 4.18.0-80.11.1.rt9.156.el8_0, +4 more
    fixed: vendor fix RHSA-2019:2741
  • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-1062.1.1.rt56.1024.el7, kernel-rt-trace 3.10.0-1062.1.1.rt56.1024.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1062.1.1.rt56.1024.el7
    fixed: vendor fix RHSA-2019:2609
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-1062.1.1.el7, kernel 3.10.0-1062.1.1.el7, bpftool 3.10.0-1062.1.1.el7, python-perf 3.10.0-1062.1.1.el7, kernel-kdump 3.10.0-1062.1.1.el7, kernel-tools 3.10.0-1062.1.1.el7, +8 more
    fixed: vendor fix RHSA-2019:2600
  • Red Hat Enterprise Linux Server EUS (v. 7.6) perf 3.10.0-957.41.1.el7, kernel 3.10.0-957.41.1.el7, bpftool 3.10.0-957.41.1.el7, python-perf 3.10.0-957.41.1.el7, kernel-kdump 3.10.0-957.41.1.el7, kernel-tools 3.10.0-957.41.1.el7, +12 more
    fixed: vendor fix RHSA-2019:4168
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-1062.1.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1062.1.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1062.1.1.el7
    fixed: vendor fix RHSA-2019:2600
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debuginfo-common-ppc64 3.10.0-957.41.1.el7, kernel-debuginfo-common-x86_64 3.10.0-957.41.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.41.1.el7
    fixed: vendor fix RHSA-2019:4168
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-1062.1.1.el7, kernel 3.10.0-1062.1.1.el7, bpftool 3.10.0-1062.1.1.el7, python-perf 3.10.0-1062.1.1.el7, kernel-tools 3.10.0-1062.1.1.el7, kernel-tools-libs 3.10.0-1062.1.1.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-1062.1.1.el7
    fixed: vendor fix RHSA-2019:2600
  • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS perf 3.10.0-957.41.1.el7, python-perf 3.10.0-957.41.1.el7
    fixed: vendor fix RHSA-2019:4168
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.85% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • blog.quarkslab.com https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.9 CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD 3.1 8.3 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 7.9 AV:A/AC:M/Au:N/C:C/I:C/A:C

Affected products

  • Broadcom brcmfmac WiFi driver

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.