CVE-2025-27043

Q: What is the severity of CVE-2025-27043?

CVE-2025-27043 has a CVSS score of 7.8 (HIGH). This vulnerability allows memory corruption in Qualcomm video firmware when processing manipulated payloads. Attackers could potentially execute arbitrary code or cause denial of service. Affects devices using Qualcomm chipsets with vulnerable video firmware.

7.8 HIGH

📋 TL;DR

This vulnerability allows memory corruption in Qualcomm video firmware when processing manipulated payloads. Attackers could potentially execute arbitrary code or cause denial of service. Affects devices using Qualcomm chipsets with vulnerable video firmware.

💻 Affected Systems

Products:

Qualcomm chipsets with video processing capabilities

Versions: Specific versions not publicly detailed; check Qualcomm advisory for chipset-specific details

Operating Systems: Android, Linux-based systems using Qualcomm chipsets

Default Config Vulnerable: ⚠️ Yes

Notes: Affects devices with Qualcomm video firmware; exact chipset models in Qualcomm advisory

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete device compromise, data theft, or persistent backdoor installation

🟠

Likely Case

Device crash/reboot (denial of service) or limited code execution in video subsystem context

🟢

If Mitigated

Denial of service only if memory protections prevent code execution

🌐 Internet-Facing: MEDIUM

🏢 Internal Only: HIGH

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Requires sending manipulated video payload to vulnerable device; complexity depends on memory layout and protections

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Qualcomm July 2025 security bulletin for chipset-specific firmware updates

Vendor Advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2025-bulletin.html

Restart Required: Yes

Instructions:

1. Check Qualcomm advisory for affected chipset models. 2. Contact device manufacturer for firmware updates. 3. Apply firmware updates following manufacturer instructions. 4. Reboot device after update.

🔧 Temporary Workarounds

Disable video processing features

all

Disable or restrict video processing capabilities if not required

Network filtering

all

Block or filter suspicious video payloads at network perimeter

🧯 If You Can't Patch

Isolate affected devices on segmented network with strict access controls
Implement application whitelisting to prevent unauthorized code execution

🔍 How to Verify

Check if Vulnerable:

Check device chipset model and firmware version against Qualcomm advisory

Check Version:

Device-specific commands vary; typically 'cat /proc/cpuinfo' or manufacturer-specific firmware check

Verify Fix Applied:

Verify firmware version has been updated to patched version specified in advisory

📡 Detection & Monitoring

Log Indicators:

Unexpected device reboots
Video subsystem crashes
Memory access violation logs

Network Indicators:

Unusual video payload patterns
Exploit-specific network traffic

SIEM Query:

Search for: (event_category:crash AND subsystem:video) OR (firmware_version:vulnerable_range)

📊 Metadata

CVE ID: CVE-2025-27043

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-120

EPSS Score: 0.02% exploit probability (4.1th percentile)

Published: July 8, 2025

Last Updated: August 11, 2025

🔗 References

https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2025-bulletin.html Patch,Vendor Advisory

📋 TL;DR

💻 Affected Systems

📦 What is this software?

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