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Back to active CVEs
High ยท CVSS 8.8CVE-2024-35811

wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detachCVE-2024-35811

Answer in brief

CVE-2024-35811 records a High severity (CVSS 8.8) vulnerability in wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 17, 2024Updated Oct 15, 2026Source checked Nov 5, 2026First seen by HOL Aug 5, 2026Material review Oct 15, 2026
Upstream Advisory

Key facts

Risk
High ยท CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
6 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=e756af5b30b008f6ffcfebf8ad0b477f6f225b62 <202c503935042272e2f9e1bb549d5f69a8681169 || >=e756af5b30b008f6ffcfebf8ad0b477f6f225b62 <8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1 || >=e756af5b30b008f6ffcfebf8ad0b477f6f225b62 <bacb8c3ab86dcd760c15903fcee58169bc3026aa || >=e756af5b30b008f6ffcfebf8ad0b477f6f225b62 <8c36205123dc57349b59b4f1a2301eb278cbc731 || >=e756af5b30b008f6ffcfebf8ad0b477f6f225b62 <0b812f706fd7090be74812101114a0e165b36744 || >=e756af5b30b008f6ffcfebf8ad0b477f6f225b62 <190794848e2b9d15de92d502b6ac652806904f5a || >=e756af5b30b008f6ffcfebf8ad0b477f6f225b62 <6678a1e7d896c00030b31491690e8ddc9a90767a || >=e756af5b30b008f6ffcfebf8ad0b477f6f225b62 <0a7591e14a8da794d0b93b5d1c6254ccb23adacb || >=e756af5b30b008f6ffcfebf8ad0b477f6f225b62 <0f7352557a35ab7888bc7831411ec8a3cbe20d78202c503935042272e2f9e1bb549d5f69a8681169, 8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1, bacb8c3ab86dcd760c15903fcee58169bc3026aa, 8c36205123dc57349b59b4f1a2301eb278cbc731, 0b812f706fd7090be74812101114a0e165b36744, 190794848e2b9d15de92d502b6ac652806904f5a, 6678a1e7d896c00030b31491690e8ddc9a90767a, 0a7591e14a8da794d0b93b5d1c6254ccb23adacb, 0f7352557a35ab7888bc7831411ec8a3cbe20d78
Linux/Linuxgeneric3.7Not reported
Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric>=0 <**
Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric>=0 <V1.1.1V1.1.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem.
  2. 2Review the reported fix. Update Linux/Linux to 202c503935042272e2f9e1bb549d5f69a8681169; Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to *; Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to V1.1.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 17, 2024

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencecert-portal.siemens.com
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencelists.debian.org
  • Source referencelists.debian.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach This is the candidate patch of CVE-2023-47233 : https://nvd.nist.gov/vuln/detail/CVE-2023-47233 In brcm80211 driver,it starts with the following invoking chain to start init a timeout worker: ->brcmf_usb_probe ->brcmf_usb_probe_cb ->brcmf_attach ->brcmf_bus_started ->brcmf_cfg80211_attach ->wl_init_priv ->brcmf_init_escan ->INIT_WORK(&cfg->escan_timeout_work, brcmf_cfg80211_escan_timeout_worker); If we disconnect the USB by hotplug, it will call brcmf_usb_disconnect to make cleanup. The invoking chain is : brcmf_usb_disconnect ->brcmf_usb_disconnect_cb ->brcmf_detach ->brcmf_cfg80211_detach ->kfree(cfg); While the timeout woker may still be running. This will cause a use-after-free bug on cfg in brcmf_cfg80211_escan_timeout_worker. Fix it by deleting the timer and canceling the worker in brcmf_cfg80211_detach. [[email protected]: keep timer delete as is and cancel work just before free]

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Nov 5, 2026
References
12 linked sources
Open source record