---
id: CVE-2026-33957
title: >-
  An issue was discovered in CustOS Driver in Samsung Mobile Processor Exynos
  1580
summary: >-
  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…
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L'
cwe:
  - CWE-787
vendor: Samsung
product: Exynos 1580 firmware
affected:
  - exynos_1580_firmware <= 2026-01-07
published: '2026-09-14'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:56:19.073'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-33957'
references:
  - url: >-
      https://semiconductor.samsung.com/support/quality-support/product-security-updates/
    label: cve@mitre.org
  - url: >-
      https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2026-33957/
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
epss: 0.00127
epssPercentile: 0.01996
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T14:56:41.510638Z'
ingestedAt: '2026-09-14T15:23:07.467Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.