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CVE-2026-23786 Samsung CVE debrief

A TOCTOU race condition was discovered in the Exynos DRM HDR Driver of Samsung Mobile Processor Exynos 1280, 2200, 1380, 1480, 2400, 1580, 2500, 1680, and 2600. This issue leads to a heap overflow, causing a kernel crash. The CVSS score is 2.8, indicating a low severity. Defenders responsible for Samsung Mobile Processor Exynos-based systems should assess the potential impact of this vulnerability and verify the presence of this issue in their systems. The CVE record and NVD vulnerability detail page provide information on this issue. Samsung has also provided references for further information and mitigation.

Vendor
Samsung
Product
Exynos 1280 firmware
CVSS
LOW 2.8
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 Samsung Mobile Processor Exynos-based systems should assess the potential impact of this vulnerability and verify the presence of this issue in their systems.

Why it matters

A TOCTOU race condition in the Exynos DRM HDR Driver leads to a heap overflow, causing a kernel crash. Defenders should prioritize verifying the presence of this vulnerability in their systems and assess the potential impact.

  • Verification of vulnerability presence in systems
  • Assessment of potential impact on system stability
  • Review and application of Samsung's provided mitigations and updates

Technical summary

A TOCTOU race condition in the Exynos DRM HDR Driver leads to a heap overflow, causing a kernel crash. This issue affects Samsung Mobile Processor Exynos 1280, 2200, 1380, 1480, 2400, 1580, 2500, 1680, and 2600. The CVSS score is 2.8, indicating a low severity. Defenders should prioritize verifying the presence of this vulnerability in their systems and assess the potential impact. Samsung has provided references for further information and mitigation.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their systems and assess the potential impact. Samsung has provided references for further information and mitigation.

Recommended defensive actions

  • Verify the presence of this vulnerability in your systems
  • Assess the potential impact of this vulnerability
  • Review and apply Samsung's provided mitigations and updates

Evidence notes

The CVE record and NVD vulnerability detail page provide information on this issue. Samsung has also provided references for further information and mitigation.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-23786 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-23786

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

  • CVE-2026-23786 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-23786

    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.