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CVE Record

CVE-2020-25672: A memory leak vulnerability was found in Linux kernel in llcp_sock_connect

A memory leak vulnerability was found in Linux kernel in llcp_sock_connect

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2020-25672 is a Linux kernel memory leak in the NFC LLCP socket connection path. The public bundle confirms the flaw and downstream Linux security updates, but does not provide CVSS, precise affected version ranges, or direct impact detail. Treat it as a kernel maintenance issue until vendor guidance confirms exposure.

Executive priority

Handle through normal kernel patch governance unless a vendor rates your platform higher. There is no cited active exploitation, but kernel memory-management flaws can affect service reliability and should not remain indefinitely unpatched.

Technical view

The reported weakness is CWE-401 in llcp_sock_connect, part of Linux NFC socket handling. A memory leak in kernel code can degrade availability if reachable under the right local conditions. The bundle names Linux Kernel broadly and includes Fedora, Debian LTS, and NetApp advisories, but fixed commits and exact vulnerable versions are not supplied.

Likely exposure

Likely exposure is Linux systems running vulnerable kernels with NFC/LLCP socket functionality present. The source bundle says Linux Kernel broadly, but does not give exact version boundaries. Fedora, Debian LTS, and NetApp advisories indicate downstream vendors shipped security updates or guidance.

Exploitation context

The bundle does not show active exploitation, and KEV is false. The available source title groups this with multiple Linux NFC socket bugs. No source in the bundle provides exploit status, remote reachability, privilege requirements, or a working exploitation path.

Researcher notes

Evidence is sparse. The CVE record identifies a memory leak in llcp_sock_connect and CWE-401, while advisories confirm downstream updates. The bundle lacks CVSS, patch commit, affected version range, and exploitability conditions, so validation should focus on vendor package status and NFC enablement.

Mitigation direction

  • Apply kernel updates from the system or appliance vendor.
  • Review Fedora, Debian LTS, NetApp, or relevant vendor advisories.
  • Prioritize systems where NFC support is enabled or unnecessary kernel modules are present.
  • Disable unneeded NFC functionality where vendor-supported.
  • Track vendor guidance for fixed package or kernel versions.

Validation and detection

  • Inventory Linux kernel versions across servers, endpoints, and appliances.
  • Check whether NFC/LLCP support is enabled or installed.
  • Compare installed packages against applicable Fedora or Debian advisories.
  • Confirm vendor security updates have been applied and systems rebooted.
  • Document systems where vendor guidance gives no fixed version.
Prepared
Confidence
medium
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-401: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2020-25672 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
8Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aLinux KernelAllListed
Weakness

CWE details

CWE-401

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-401 · source CWE mapping

Missing Release of Memory after Effective Lifetime

Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs