CVE-2026-24796
Out-of-Bounds Read in CloverBootloader Oniguruma Module
Publication date: 2026-01-27
Last updated on: 2026-01-27
Assigner: Government Technology Agency of Singapore Cyber Security Group (GovTech CSG)
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| cloverhackycolor | cloverbootloader | to 5162 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-125 | The product reads data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an out-of-bounds read issue in the CloverBootloader's regular expression handling code, specifically in the function fetch_interval_quantifier(), which was cloned from the Oniguruma library. The function did not include a critical security patch that fixed a heap-buffer-overflow caused by a double PFETCH operation. This flaw could cause the program to read memory outside the intended buffer, potentially leading to memory corruption or crashes. [1]
How can this vulnerability impact me? :
The vulnerability can lead to memory corruption or crashes in the CloverBootloader, which may affect system stability or security. An attacker exploiting this could potentially cause denial of service or other unpredictable behavior due to the out-of-bounds read, although no direct privilege escalation or code execution is explicitly stated. [1]
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update CloverBootloader to a version including the security fix merged on April 1, 2025, which patches the vulnerable function fetch_interval_quantifier() by applying the critical security patch from the Oniguruma library. This update eliminates the out-of-bounds read and heap-buffer-overflow issues. Ensure you are running CloverBootloader version 5162 or later where this fix is included. [1]