CVE-2026-23789 Samsung CVE debrief

Who should care

Defenders responsible for Samsung Mobile Processor and Wearable Processor Exynos devices should assess exposure and prioritize patching to prevent potential kernel memory corruption and arbitrary code execution.

Why it matters

CVE-2026-23789 is a double-free vulnerability in the Exynos MFC encoder driver that may lead to kernel memory corruption and potential arbitrary code execution, requiring verification of affected versions and prioritization of patching.

• Verification of affected versions is required to determine exposure
• Potential kernel memory corruption and arbitrary code execution may occur if the vulnerability is exploited
• Defenders should prioritize patching to prevent potential exploitation

Technical summary

The Exynos MFC encoder driver is vulnerable to a double-free issue due to improper cleanup of dma_buf references during error handling, potentially leading to kernel memory corruption and arbitrary code execution. This issue affects Samsung Mobile Processor and Wearable Processor Exynos 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 2600, 1680, W920, W930, and W1000. Defenders should prioritize verifying affected versions and assessing exposure, as the vulnerability may lead to kernel memory corruption and potential arbitrary code execution.

Defensive priority

Defenders should prioritize verifying affected versions and assessing exposure, as the vulnerability may lead to kernel memory corruption and potential arbitrary code execution.

Recommended defensive actions

• Verify affected versions of Samsung Mobile Processor and Wearable Processor Exynos
• Assess exposure and prioritize patching for vulnerable devices
• Monitor for potential kernel memory corruption and arbitrary code execution
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability, but do not specify affected versions or confirm exploitation. Defenders should verify affected versions of Samsung Mobile Processor and Wearable Processor Exynos and assess exposure. The Exynos MFC encoder driver vulnerability may lead to kernel memory corruption and potential arbitrary code execution. Verification of affected versions is required to determine exposure. The vulnerability affects Samsung Mobile Processor and Wearable Processor,

Sources and 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.