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Back to active CVEs
Medium · CVSS 5.5CVE-2022-3564

Linux Kernel Bluetooth l2cap_core.c l2cap_reassemble_sdu use after freeCVE-2022-3564

Answer in brief

CVE-2022-3564 records a Medium severity (CVSS 5.5) vulnerability in Linux Kernel Bluetooth l2cap_core.c l2cap_reassemble_sdu use after free. The current sources do not mark it as known exploited. The current feed maps Linux/Kernel (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 Oct 17, 2022Updated Oct 14, 2026Source checked Oct 14, 2026First seen by HOL Oct 14, 2026Material review Oct 14, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 5.5. 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/Kernel (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Kernelgenericn/aNot reported
Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric>=0 <V1.1V1.1

Recommended response

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

Evidence timeline and material changes

  1. Published upstream

    Oct 17, 2022

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

  2. Source modified

    Oct 14, 2026

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

  3. First seen by HOL

    Oct 14, 2026

Sources and claim methodology

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

A vulnerability classified as critical was found in Linux Kernel. Affected by this vulnerability is the function l2cap_reassemble_sdu of the file net/bluetooth/l2cap_core.c of the component Bluetooth. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211087.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • NGINX ngx_http_core_module vulnerabilityAlso CWE-416
  • NGINX ngx_http_js_module vulnerabilitySame generic ecosystem
  • NGINX ngx_http_js_module vulnerabilitySame generic ecosystem
  • Angular SSR: Denial of Service (DoS) via Infinite Loop on Malformed DOCTYPESame generic ecosystem
  • Angular: Denial of Service via Numeric URL Matrix Parameters in Server-Side Rendering (SSR)Same generic ecosystem
  • Angular DevTools (Local DoS)Same generic ecosystem

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-119, CWE-416
Source
CVE List V5
Source checked
Oct 14, 2026
References
6 linked sources
Open source record