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How the CVE Works:
CVE-2025-23102 is a double-free vulnerability in Samsung Exynos mobile processors (980, 990, 1080, 2100, 1280, 2200, 1380, 1480, and 2400). The flaw occurs when memory allocated for kernel objects is freed twice due to improper error handling, corrupting kernel memory. Attackers can exploit this to execute arbitrary code with elevated privileges, bypassing security restrictions. The vulnerability stems from race conditions in memory management, allowing malicious apps or local attackers to trigger heap corruption, leading to privilege escalation or kernel panic.
DailyCVE Form:
Platform: Samsung Exynos
Version: 980-2400
Vulnerability: Double Free
Severity: Critical
Date: 06/10/2025
Prediction: Patch by Q3 2025
What Undercode Say:
Exploitation:
- Trigger Double-Free: Crafted syscall sequences force kernel to free memory twice.
- Heap Feng Shui: Manipulate memory layout to control freed chunks.
- ROP Payload: Overwrite kernel pointers for privilege escalation.
Protection:
1. Patch Kernel: Apply Samsung’s upcoming security update.
- Restrict Syscalls: Use seccomp to filter untrusted calls.
3. Kernel Hardening: Enable `CONFIG_DEBUG_LIST` and `CONFIG_SLAB_FREELIST_HARDENED`.
Detection Commands:
dmesg | grep "double free detected" cat /proc/version | grep -i "exynos"
Mitigation Script:
include <linux/slab.h>
void safe_alloc(size_t size) {
void ptr = kmalloc(size, GFP_KERNEL);
if (!ptr) panic("Alloc failed");
return ptr;
}
Exploit POC (Conceptual):
void trigger_double_free() {
void ptr = kmalloc(64, GFP_KERNEL);
kfree(ptr);
kfree(ptr); // Triggers CVE-2025-23102
}
Analytics:
- Attack Vector: Local
- Complexity: High (requires heap grooming)
- Impact: Root access, denial-of-service
- Patch Delay Risk: Critical (wormable in targeted attacks)
References:
- MITRE CVE-2025-23102
- Samsung Security Bulletin (Pending)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
