Exynos 1480 Firmware CVE-2025-23107

This vulnerability presents a HIGH real-world risk despite the data limitations. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L) indicates network accessibility with no authentication or user interaction required, making exploitation straightforward once a valid attack vector is identified. The presence of high confidentiality impact and integrity/availability impact suggests potential for privilege escalation or code execution. Without confirmed KEV (Known Exploited Vulnerability) status, EPSS probability data, or public POC availability in the provided intelligence, the real-world exploitation likelihood remains unknown but should be treated as HIGH given: (1) the simplicity of the vulnerability class (missing bounds check), (2) the network-accessible attack surface, and (3) the targeting of ubiquitous mobile processors in millions of devices. The vulnerability affects core processor functionality, making it difficult for end users to mitigate independently; remediation requires vendor patches deployed at the firmware/bootloader level. This is a genuine priority vulnerability requiring immediate patching of affected devices.

An attacker crafts a malicious network packet (e.g., via cellular network, WiFi, or Bluetooth) targeting a processor firmware component (such as modem firmware or secure enclave IPC handler) that processes user-controlled input without proper length validation. The attacker sends a specially formatted message with an oversized or malformed length field, causing the processor to write data beyond an allocated buffer in secure memory. This out-of-bounds write corrupts sensitive processor state, bootloader code, or secure enclave firmware, potentially allowing the attacker to: (1) inject code into the secure processor to bypass TEE (Trusted Execution Environment) protections, (2) escalate privileges from user space to kernel or secure modes, (3) extract cryptographic keys or sensitive data, or (4) achieve persistent compromise of the device's secure boot chain. The attack requires no user interaction and can be triggered remotely over a network, making it suitable for mass exploitation. A public POC does not appear to be widely available based on current intelligence, but the straightforward nature of the vulnerability (missing bounds check) suggests that exploitation is relatively straightforward once the vulnerable code path is identified.