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Vulnerability Summary Table

CVE ID	Vulnerability Type	CVSS Score	Severity	Exploitability	Exploit Availability	Impact
CVE-2026-21675	Use After Free	8.8	High	High	No public PoC	Memory corruption, possible RCE
CVE-2026-21673	Integer Overflow / Underflow	8.1	High	High	No public PoC	Crash, memory overwrite
CVE-2026-21507	Infinite Loop (DoS)	7.5	High	Very High	Easily reproducible	CPU exhaustion, service outage

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CVE-2026-21675 – Use After Free

Vulnerability Overview

CVE ID: CVE-2026-21675
Product: iccDEV
Vulnerability Type: Use After Free
CVSS Score: 8.8
Severity: High
Attack Vector: Remote / Local (crafted ICC file)
User Interaction: Required (automatic file processing)
Exploitability: High
Exploit Availability: No public exploit, but technically feasible

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Description

iccDEV fails to properly manage memory during ICC profile parsing. When malformed ICC data triggers an internal error, memory allocated for profile structures is freed too early. Despite this, the application later attempts to access that freed memory.

This results in a classic use-after-free condition, allowing attackers to corrupt memory or influence application behavior.

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Exploitation Details

An attacker can exploit this issue by creating a specially crafted ICC profile that:

• Forces allocation of multiple ICC tag structures
• Triggers error-handling logic that frees those structures
• Causes execution to continue using stale memory pointers

If the freed memory is reallocated or overwritten, this can lead to:

• Application crashes
• Heap corruption
• Potential execution of attacker-controlled code

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Attack Scenarios

• Uploading a malicious image to a web application that extracts color profiles
• Injecting ICC metadata into documents processed automatically
• Triggering crashes in automated image conversion pipelines

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MITRE ATT&CK Mapping

• T1203 – Exploitation for Client Execution
• T1499 – Endpoint Denial of Service
• T1059 – Command Execution (follow-on activity)

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Detection & Monitoring

Indicators

• Segmentation faults during ICC parsing
• Access violation errors
• Repeated crashes linked to image processing

Log Sources

• Application logs
• OS crash logs
• Container and service restart logs

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Payload Indicators

• ICC files with overlapping tag offsets
• Unusual tag counts
• Invalid memory references in tag tables

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Splunk Detection Rule (SPL)

index=app_logs
("segmentation fault" OR "access violation")
AND ("icc" OR "icc profile")
| stats count by host, process

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Microsoft Sentinel Detection Rule (KQL)

AppCrashLogs
| where ErrorMessage has_any ("segmentation fault", "access violation")
| where ProcessName contains "icc"
| summarize count() by Computer, ProcessName

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Remediation

Upgrade iccDEV to version 2.3.1.1 or later

Official Patch Link:
https://iccdev.org/releases/2.3.1.1

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CVE-2026-21673 – Integer Overflow / Underflow

Vulnerability Overview

CVE ID: CVE-2026-21673
Product: iccDEV
Vulnerability Type: Integer Overflow / Underflow
CVSS Score: 8.1
Severity: High
Attack Vector: Remote / Local
User Interaction: Required
Exploitability: High

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Description

iccDEV does not adequately validate numeric values within ICC profiles. Malformed values can cause integer calculations to overflow or underflow, resulting in incorrect memory allocation sizes.

This can lead to memory writes beyond allocated boundaries or attempts to allocate invalid buffer sizes.

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Exploitation Details

An attacker can craft ICC files with:

• Extremely large length values
• Negative values interpreted as unsigned integers
• Malformed offset calculations

These values cause memory corruption or immediate application crashes.

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MITRE ATT&CK Mapping

• T1203 – Exploitation for Client Execution
• T1068 – Privilege Escalation
• T1499 – Denial of Service

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Detection & Monitoring

Indicators

• Heap corruption errors
• Crashes tied to specific ICC files
• Memory allocation failures

Log Sources

• Application debug logs
• Memory allocator logs
• Crash dump analysis

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Payload Indicators

• Oversized ICC profile sizes
• Negative or inconsistent tag length fields

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Splunk Detection Rule (SPL)

index=app_logs
("heap corruption" OR "integer overflow")
AND "icc"
| stats count by host

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Microsoft Sentinel Detection Rule (KQL)

AppCrashLogs
| where ErrorMessage has_any ("heap corruption", "overflow")
| where ProcessName contains "icc"
| summarize count() by Computer

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Remediation

Apply the vendor patch addressing integer validation.

Official Patch Link:
https://iccdev.org/security/advisories/CVE-2026-21673

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CVE-2026-21507 – Infinite Loop (Denial of Service)

Vulnerability Overview

CVE ID: CVE-2026-21507
Product: iccDEV
Vulnerability Type: Infinite Loop
CVSS Score: 7.5
Severity: High
Attack Vector: Remote
Exploitability: Very High
Exploit Availability: Easily reproducible

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Description

iccDEV lacks proper termination conditions when parsing certain ICC structures. Malformed profiles can force the parser into an infinite loop, consuming CPU resources indefinitely.

This vulnerability is trivial to exploit and does not require memory corruption.

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Exploitation Details

Attackers can supply ICC profiles with:

• Recursive tag references
• Zero-increment loop counters
• Invalid loop termination markers

Processing such files results in sustained CPU usage until the process is terminated.

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MITRE ATT&CK Mapping

• T1499 – Endpoint Denial of Service
• T1498 – Resource Exhaustion

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Detection & Monitoring

Indicators

• Sudden CPU spikes
• Hung or stalled image processing jobs
• Requests that never complete

Log Sources

• Performance metrics
• Application timing logs
• OS resource monitoring logs

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Payload Indicators

• ICC files causing unusually long parse times
• Profiles with cyclic tag definitions

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Splunk Detection Rule (SPL)

index=perf_logs
cpu_usage>90
AND process="icc*"
| stats avg(cpu_usage) by host, process

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Microsoft Sentinel Detection Rule (KQL)

Perf
| where CounterName == "% Processor Time"
| where InstanceName contains "icc"
| where CounterValue > 90
| summarize avg(CounterValue) by Computer

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Remediation

Apply the vendor patch introducing loop limits and timeout controls.

Official Patch Link:
https://iccdev.org/security/advisories/CVE-2026-21507

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Final Takeaway

• Treat ICC files as untrusted input
• Monitor image pipelines closely
• Apply patches immediately
• Restrict ICC parsing where not required

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