CVE-2026-33957

Out-of-Bounds Shared Memory Access in CustOS Driver on Exynos 1580

Published Sep 14, 2026 CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Out-of-Bounds Shared Memory Access in CustOS Driver on Exynos 1580
Type Values Removed Values Added
Title Out‑of‑Bounds Read/Write via Oversized Shared Memory Request in CustOS Driver
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Out‑of‑Bounds Read/Write via Oversized Shared Memory Request in CustOS Driver
Type Values Removed Values Added
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.
First Time appeared Samsung
Samsung exynos 1580 Firmware
Weaknesses CWE-787
CPEs cpe:2.3:a:samsung:exynos_1580_firmware:*:*:*:*:*:*:*:*
Vendors & Products Samsung
Samsung exynos 1580 Firmware
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 14, 2026, 6:14 PM
Reserved
Mar 24, 2026, 12:00 AM
Status
Awaiting Analysis
Published
Sep 14, 2026, 2:17 AM
Modified
Sep 22, 2026, 7:56 PM