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PatchSiren cyber security CVE debrief

CVE-2026-33957 Samsung CVE debrief

A vulnerability was discovered in the CustOS Driver of Samsung Mobile Processor Exynos 1580, which could allow an attacker to perform out-of-bounds read and write operations, potentially leading to memory corruption or information leakage. This issue arises from requesting oversized shared memory from the custos_iwc device, enabling out-of-bounds access. Defenders should assess the exposure of Exynos 1580-based systems to this vulnerability and verify system configurations and patch levels to prevent potential memory corruption or information leakage.

Vendor
Samsung
Product
Exynos 1580 firmware
CVSS
MEDIUM 4.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-14
Original CVE updated
2026-09-22
Advisory published
2026-09-14
Advisory updated
2026-09-22

Who should care

Defenders responsible for Exynos 1580-based systems, security teams, and system administrators should be aware of this vulnerability. They should assess the exposure of their systems, verify configurations and patch levels, and implement necessary mitigations to prevent potential memory corruption or information leakage. Additionally, operators of affected platforms and vulnerability management teams should review

Why it matters

Defenders should assess exposure of Exynos 1580-based systems to this vulnerability and verify system configurations and patch levels to prevent potential memory corruption or information leakage.

  • Potential memory corruption or information leakage
  • Need to verify affected systems and patch levels
  • Possible impact on system confidentiality and integrity

Technical summary

The CustOS Driver in Samsung Mobile Processor Exynos 1580 is vulnerable to out-of-bounds read and write operations due to improper handling of shared memory requests. This vulnerability could lead to memory corruption or information leakage if exploited. The issue is caused by the lack of proper bounds checking in the custos_iwc device, allowing attackers to access memory outside the intended range.

Defensive priority

Medium priority for defenders to assess exposure and verify affected systems

Recommended defensive actions

  • Assess exposure of Exynos 1580-based systems to this vulnerability
  • Verify system configurations and patch levels
  • Monitor for potential memory corruption or information leakage

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, and further verification is required to determine the affected systems and potential impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-33957 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-33957

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-33957 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-33957

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.