Samsung Exynos CVE-2026-23788

Exploitation requires local code execution on a device powered by a Samsung Exynos 1280, 2200, or 1380 SoC. The attacker must hold at minimum low-level user privileges (PR:L per CVSS vector) sufficient to invoke DRM HDR driver ioctls - a condition typically met by any installed application on Android. High attack complexity (AC:H) means reliable triggering depends on specific heap layout conditions that may not be consistently reproducible across firmware versions or device states. The vulnerability is only reachable through the DPU/DRM HDR processing path, gated to contexts where HDR display metadata is actively being processed. Remote exploitation is not possible; a physical device or installed application is the required entry point. No user interaction beyond the attacker's own process execution is needed.

The vendor-assigned CVSS score of 4.2 (Low) with vector AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L reflects a locally triggered, high-complexity flaw. The high attack complexity (AC:H) is significant: reliable exploitation requires specific heap layout conditions and precise manipulation of DRM HDR parameters, meaning even a mid-sized municipal IT team in bytom managing a fleet of Samsung Galaxy devices would not face imminent remote compromise from this issue. No exploit code is publicly available and this CVE does not appear in CISA KEV, further reducing urgency. That said, the scope change (S:C) warrants attention - the corruption lands in kernel space, which historically means a more capable attacker could attempt to leverage the primitive toward privilege escalation beyond the crash-only impact described. The availability impact appears understated at A:L given that kernel memory corruption leading to a system crash represents a complete availability loss; this analysis independently assesses it as A:H. No confidentiality impact is described and none is inferred.

A locally installed application on an Exynos 1280, 2200, or 1380-powered device submits crafted DRM HDR metadata with manipulated buffer size fields via a DRM ioctl, triggering a heap overflow in the kernel DPU HDR driver. The overflowed data corrupts adjacent kernel heap objects, causing a kernel panic and device reboot. No public exploit code exists at time of analysis, and achieving impact beyond denial-of-service would require significant additional exploitation research given the high complexity barrier.