What is the CVSS score of CVE-2026-55323?

CVE-2026-55323 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Google CVE-2026-55323

EUVD-2026-78947 HIGH

Heap-based Buffer Overflow (CWE-122)

2026-09-15 Google_Devices

GHSA-7q3x-f5fp-2whq

Privilege Escalation Buffer Overflow Google Heap Overflow

7.8

CVSS 3.1 · Vendor: Google_Devices

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Vulnerability Assessment

Weakness

CWE

CWE-122

ASVS 5.0

V15 - Secure Coding and Architecture Heap buffer bounds checking

MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 16, 2026

Local privilege escalation in the Android kernel's fingerprint (gf) driver allows a process with access to the fingerprint device interface to corrupt kernel heap memory and gain root-level code execution. The flaw is a heap-based out-of-bounds write in gf_base_update_finger_base() within gf_base.c, exploitable with a low-privileged local context and no user interaction, consistent with a CVSS 3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N). Fixes are delivered through the Android/Pixel Security Bulletin dated 2026-09-01; no public exploit code or CISA KEV listing was identified at time of analysis.

Affected VersionsENISA

Android Android kernel

Affects your stack

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Google_Devices) PRIMARY 7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (Google_Devices) · only source for this CVE.

CVSS VectorVendor: Google_Devices

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Sep 15, 2026 - 18:33 cve.org

UNKNOWN (no severity yet)

CVE Published

Sep 15, 2026 - 18:33 cve.org

HIGH 7.8

DescriptionCVE.org

In gf_base_update_finger_base of gf_base.c, there is a possible out-of-bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Threat Intelligence Overview

EPSS Score

0.1%

Top 100% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +39

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Privilege Escalation HIGH

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Heap Overflow HIGH

A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.