Out-of-Bounds Read/Write in CustOS Driver on Samsung Exynos 1580
CVE-2026-33957 Published on September 14, 2026
An issue was discovered in CustOS Driver in Samsung Mobile Processor Exynos 1580. Requesting oversized shared memory from the custos_iwc device enables out-of-bounds read and write, potentially leading to memory corruption or information leakage.
Vulnerability Analysis
CVE-2026-33957 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity, and a small impact on availability.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-33957 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-33957
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Affected Versions
Samsung Exynos 1580 firmware:- Before and including 2026-01-07 is affected.