CVE-2016-2226

What it actually does

Integer overflow in string_appends triggers buffer overflow enabling arbitrary code execution when processing a crafted binary.

Why it matters to the business

Successful exploitation on unpatched Grafana instances could allow full system compromise via crafted executables, though the issue is years old with low probability of widespread exploitation.

How an attack unfolds

An attacker prepares a malicious executable containing malformed symbol names that overflow an integer in the demangler, causing a buffer overflow that redirects execution flow to attacker-controlled code.

How to fix it

Upgrade grafana-9 (Chainguard) to 9.5.20-r1 and grafana-oci-compat-9 (Chainguard) to 9.5.20-r1.

How to confirm the fix worked

Confirm installed package versions match or exceed the listed fixed releases using package manager queries.

Typical attack path

1. Craft executable with oversized or malformed symbol names
2. Deliver file to target environment
3. Trigger demangling via affected library path
4. Execute arbitrary code through buffer overflow

How to detect it

Examine process logs and crash dumps for unexpected demangler activity or buffer-related faults when handling external binaries; review file ingestion events for suspicious executables.

What your security team should do

• Apply the listed package updates across all instances
• Inventory all deployments to identify remaining vulnerable versions
• Disable unnecessary binary processing features if updates cannot be applied immediately