CVE-2025-20801

Local privilege escalation via seninf double free

Published Jan 6, 2026 · Updated Jan 6, 2026

Double free in MediaTek seninf on affected chipsets allows local users with System privilege to escalate privileges without interaction. A race condition permits the same memory allocation to be freed twice, corrupting memory; MediaTek has not disclosed the racing operations. Exploitation requires prior System privilege and local execution, and successful memory corruption grants higher execution privileges.

CVSS severity7.0
High
EPSS probability0.06%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Double free in MediaTek seninf on affected chipsets allows local users with System privilege to escalate privileges without interaction. A race condition permits the same memory allocation to be freed twice, corrupting memory; MediaTek has not disclosed the racing operations. Exploitation requires prior System privilege and local execution, and successful memory corruption grants higher execution privileges.

The record

CVE
CVE-2025-20801
Published
Jan 6, 2026
Updated
Jan 6, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362, CWE-415, T1404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.0CISA-ADPCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-415Double Free
T1404Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo