CVE-2026-24796
Unknown Unknown - Not Provided
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
Out-of-bounds Read vulnerability in CloverHackyColor CloverBootloader (MdeModulePkg/Universal/RegularExpressionDxe/Oniguruma modules). This vulnerability is associated with program files regparse.C. This issue affects CloverBootloader: before 5162.
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Meta Information
Published
2026-01-27
Last Modified
2026-01-27
Generated
2026-06-16
AI Q&A
2026-01-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-24796
EUVD
EUVD-2026-4719
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
cloverhackycolor cloverbootloader to 5162 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
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Executive Summary

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]

Impact Analysis

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]

Mitigation Strategies

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]

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