CVE-2026-33957: Memory Corruption (CVSS 4.2)

Description

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.

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CVSS v3.1 Score

4.2

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L

EPSS — Exploit Prediction

0.0009

Probability of exploitation

0.01%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

References

Other References

https://semiconductor.samsung.com/support/quality-support/product-security-updates/ https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2026-33957/

Frequently Asked Questions

What is CVE-2026-33957? +

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. It has a CVSS v3.1 base score of 4.2 (MEDIUM).

How severe is CVE-2026-33957? +

CVE-2026-33957 has a CVSS v3.1 score of 4.2 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0009, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-33957? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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