CVE-2023-23559

What it actually does

Integer overflow in addition within rndis_query_oid allows out-of-bounds memory access and kernel memory corruption.

Why it matters to the business

Local attackers can achieve full system compromise on unpatched Linux hosts, risking data exposure and unauthorized control; widespread kernel deployments increase exposure surface.

How an attack unfolds

A local attacker with access to the RNDIS wireless interface supplies a crafted OID query that overflows during length calculation, corrupting adjacent kernel structures to execute arbitrary code with kernel privileges.

How to fix it

Apply kernel update containing commit b870e73a56c4cccbec33224233eaf295839f228c; rebuild and reboot into patched kernel version beyond 6.1.5.

How to confirm the fix worked

Confirm kernel source contains the referenced commit or verify running kernel version exceeds affected range; test driver behavior with known overflow-triggering inputs in isolated environment.

Typical attack path

1. Gain local shell or user access on target Linux system
2. Locate and interact with RNDIS wireless driver interface
3. Transmit malicious OID query to trigger addition overflow
4. Leverage resulting memory corruption for privilege escalation or persistence

How to detect it

Review kernel logs for rndis_wlan module crashes or unexpected memory faults; monitor for anomalous OID queries from user-space processes.

What your security team should do

• Immediately upgrade affected kernels to fixed commit
• Limit unprivileged local access to systems exposing wireless drivers
• Audit wireless interface usage in production workloads