CVE-2023-52789

What it actually does

Unchecked kstrdup() return value in vcc_probe leads to NULL pointer dereference and potential kernel crash or memory corruption.

Why it matters to the business

Kernel instability or denial of service can interrupt services on affected systems; low EPSS and no KEV status indicate limited real-world urgency despite the memory corruption family classification.

How an attack unfolds

An attacker forces kstrdup failure during device probe initialization to trigger the missing NULL check, resulting in dereference; listed threat actor references appear unrelated to this low-prevalence issue.

How to fix it

Apply the upstream fix present in commit bcd415ed91e3d03b838c37b080c7a2c0b863112c for open-telemetry/opentelemetry-go-contrib; verify the kstrdup return-value check is present after update.

How to confirm the fix worked

Inspect the vcc_probe function for the added kstrdup error check; confirm no NULL dereference path remains by reviewing the fixed commit.

Typical attack path

1. Trigger conditions that cause memory allocation failure in vcc_probe
2. Invoke the probe function through device or driver initialization
3. Dereference the unchecked NULL pointer to induce crash or corruption

How to detect it

Review kernel logs and crash dumps for vcc_probe related NULL dereference events; correlate with device initialization timestamps.

What your security team should do

• Prioritize patching systems running vulnerable kernel versions containing the vcc driver
• Monitor kernel logs for NULL pointer dereference signatures related to tty/vcc
• Reassess exposure after applying the listed fixed commit