CVE-2025-48593 technical details

droid42

Hello,

6 days ago the android security bulletin was released

https://source.android.com/docs/security/bulletin/2025-11-01

In theory then there should be anywhere a technical description of this problem but anywhere i searched for it there was only that it is a critical RCE and we should update immediately (if not already done).
Has anyone found somewhere a more helpfull description of this CVE? Or is there any kinda embargo for details which i dont know?

GrapheneOS

droid42 GrapheneOS and the stock Pixel OS both provided the patches for both vulnerabilities in September 2025 despite both patches being deferred to November 2025.

One is a Critical severity Bluetooth remote code execution vulnerability caused by memory corruption which we heavily protected against via hardened_malloc and hardware memory tagging. The issue seems to happen when there's an existing discovery database set up and the paired device tries to set up another. It's a very tiny patch and it's likely a lifetime-related issue causing a use-after-free which is the main class of vulnerability protected against by hardened_malloc's hardware-agnostic protections along with MTE providing strong protection against it combined with those. It's extremely difficult to exploit use-after-free bugs with hardened_malloc with MTE and will often be impractical or impossible. Out-of-bounds accesses are also extremely hard to exploit with hardened_malloc + MTE, but even without MTE they're still significantly harder to exploit in most cases.

The other issue is irrelevant to GrapheneOS since we don't use out-of-band APEX updates.

final

JayJay This is AI generated and completely fake. Random guys like to create fake CVE writeups to try and fool people for engagements.

JayJay // Simplified pseudocode of vulnerable path
void process_system_packet(Packet *p) {
if (p->type == MALICIOUS_TYPE) {
// ⚠️ No bounds check!
memcpy(kernel_buffer, p->payload, p->size); // CVE-2025-48593
execute_payload(); // RCE achieved
}

A real CVE writeup would never pseudocode and writing emojis inside the code itself is a major indicator. What the hell is "execute_payload()"? you'll know what a real POC is because it would be demonstrated and be real code. They also put in a a link to the NVD for this CVE which is 404d. There's also a flowchart about patching, why would you make a flowchart about how to patch? Real writeups just say it's been fixed since {VERSION}.

Their profile is also linking a linktree to a completely different person who makes plushie frogs. Looks nice. Might buy some.