High severity8.1NVD Advisory· Published Dec 26, 2021· Updated Jun 17, 2026
CVE-2021-44078
CVE-2021-44078
Description
An issue was discovered in split_region in uc.c in Unicorn Engine before 2.0.0-rc5. It allows local attackers to escape the sandbox. An attacker must first obtain the ability to execute crafted code in the target sandbox in order to exploit this vulnerability. The specific flaw exists within the virtual memory manager. The issue results from the faulty comparison of GVA and GPA while calling uc_mem_map_ptr to free part of a claimed memory block. An attacker can leverage this vulnerability to escape the sandbox and execute arbitrary code on the host machine.
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Affected products
2- Unicorn Engine/Unicorn Enginedescription
- Range: <2.0.0-rc5
Patches
Vulnerability mechanics
References
5- github.com/unicorn-engine/unicorn/commit/c733bbada356b0373fa8aa72c044574bb855fd24nvdPatchThird Party Advisory
- github.com/unicorn-engine/unicorn/compare/2.0.0-rc4...2.0.0-rc5nvdPatchThird Party Advisory
- gist.github.com/jwang-a/cb4b6e9551457aa299066076b836a2cdnvdThird Party Advisory
- github.com/jwang-a/CTF/blob/master/MyChallenges/Pwn/Unicorns_Aisle/UnicornsAisle.pdfnvdThird Party Advisory
- www.unicorn-engine.org/changelog/nvdVendor Advisory
News mentions
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