CVE-2026-53615 — util-linux is a random collection of Linux utilities.¶
Key facts
CVE-2026-53615 is a High (8.0) vulnerability: util-linux is a random collection of Linux utilities.. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-53615 |
| Severity | High (8.0) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-53615/ |
Details¶
English | 한국어
Description¶
util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, parse_dos_extended() in libblkid/src/partitions/dos.c computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap cur_start + start to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-53615 |
| CVSS Score | 8.0 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-53615/poc.py
Usage¶
# Run PoC against target
python3 poc.py --target <TARGET_URL>
# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>
⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.
Test Lab¶
This repository includes a Docker-based test environment with both vulnerable and patched applications.
Quick Start¶
# Clone and navigate to CVE directory
cd CVE-2026-53615
# Start both applications
docker-compose up -d
# Run tests
./run-tests.sh # Linux/Mac
./run-tests.ps1 # Windows PowerShell
Application Endpoints¶
| Application | URL | Status |
|---|---|---|
| Vulnerable App | http://localhost:8080 | Shows vulnerability |
| Patched App | http://localhost:8081 | Demonstrates fix |
Directory Structure¶
├── README.md # English documentation
├── README_KO.md # Korean documentation
├── poc.py # PoC detection script
├── docker-compose.yml # Container orchestration
├── run-tests.sh # Linux/Mac test runner
├── run-tests.ps1 # Windows test runner
├── vulnerable-app/ # Vulnerable version
│ ├── app.py
│ ├── Dockerfile
│ └── requirements.txt
└── patched-app/ # Fixed version
├── app.py
├── Dockerfile
└── requirements.txt
References¶
- https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623
- https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31
- https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af
- https://github.com/util-linux/util-linux/releases/tag/v2.41.4
- https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5
Generated by PoC Generator on 2026-10-16T15:47:11.06917867
Frequently asked questions¶
What is CVE-2026-53615?¶
CVE-2026-53615 is a High (8.0) vulnerability: util-linux is a random collection of Linux utilities.. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-53615?¶
Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.
How do I block or mitigate CVE-2026-53615?¶
Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.
For authorized security testing and research only. See the full source and NVD record.