HOMEVULNERABILITIESCVE-2020-25670
HIGH

CVE-2020-25670

CWE-416Published: May 26, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

A vulnerability was found in Linux Kernel where refcount leak in llcp_sock_bind() causing use-after-free which might lead to privilege escalations.

NVD Source

Technical Analysis

CVE-2020-25670 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
Linux1 product(s)
linux kernel
netapp20 product(s)
active iq unified managercloud backupsolidfire baseboard management controller firmwaresolidfire baseboard management controllerh410c firmwareh410ch300s firmwareh300sh500s firmwareh500sh700s firmwareh700s+8
Source: NVD CPE · 25 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

All References (18)

http://www.openwall.com/lists/oss-security/2020/11/01/1Exploit · Mailing List · Patch · Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/11/4Exploit · Mailing List · Patch · Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/11/01/1Exploit · Mailing List · Patch · Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/11/01/1Exploit · Mailing List · Patch · Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/11/4Exploit · Mailing List · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2020-25670
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-416
CISA KEVNo
Affected4 vendor(s)
PublishedMay 26, 2021

Related CVEs (CWE-416)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2020-25670 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.