CVE-2024-50069

What it actually does

Unchecked devm_kasprintf() return value in the Apple pinctrl driver can yield a NULL pointer that is later dereferenced, enabling local memory corruption or kernel panic.

Why it matters to the business

Systems running affected Linux kernels on Apple hardware may experience unexpected crashes or instability; the low exploitability and stable EPSS score limit widespread operational risk, though kernel-level issues still require prompt patching.

How an attack unfolds

An attacker with local access triggers the Apple pinctrl initialization path under memory-pressure conditions that cause devm_kasprintf to fail; because the NULL result is not validated, subsequent dereference produces a kernel fault that can be leveraged for denial-of-service or, in limited scenarios, further corruption.

How to fix it

Update the Linux kernel to commit 0a4d4dbef622ac8796a6665e0080da2685f9220a or later; rebuild and deploy the fixed kernel package on all affected Apple hardware systems.

How to confirm the fix worked

Confirm the running kernel contains commit 0a4d4dbef622ac8796a6665e0080da2685f9220a; inspect the pinctrl-apple source to verify the devm_kasprintf return value is now checked before use.

Typical attack path

1. Obtain local code execution on target system
2. Force memory exhaustion while Apple pinctrl driver loads
3. Trigger device-tree or pin configuration that invokes the vulnerable kasprintf call
4. Dereference the resulting NULL pointer to induce kernel panic or corruption

How to detect it

Review kernel logs for NULL pointer dereference oops messages originating from the pinctrl-apple driver; correlate with low-memory conditions during device initialization.

What your security team should do

• Prioritize kernel upgrade on all Apple Silicon or Apple hardware running vulnerable kernels
• Monitor vendor advisories for distribution-specific packages that include the referenced commit
• Apply the fix within standard change windows given the medium CVSS and low EPSS