CVE-2022-43552

What it actually does

Use-after-free condition in memory management allows dangling pointer access after deallocation, enabling memory corruption or control-flow hijacking during subsequent operations.

Why it matters to the business

Systems relying on the affected library for network transfers face elevated risk of remote compromise or denial of service, with urgency driven by public exploit availability despite low EPSS and absence from KEV.

How an attack unfolds

An attacker supplies crafted input that triggers premature freeing of an object still referenced later in the processing flow; with exploit code available, this can be leveraged to corrupt heap metadata and achieve arbitrary code execution.

How to fix it

Upgrade curl/curl (GIT) to commit c12fb3ddaf48e709a7a4deaa55ec485e4df163ee or later; rebuild and redeploy all dependent applications.

How to confirm the fix worked

Confirm the running binary or library reports a commit hash at or after c12fb3ddaf48e709a7a4deaa55ec485e4df163ee and execute regression tests covering the affected code paths.

Typical attack path

1. Identify a reachable code path that performs allocation followed by conditional free
2. Craft input to force the free while retaining a reference
3. Trigger reuse of the dangling pointer to corrupt memory
4. Leverage corruption to redirect execution or leak data

How to detect it

Review application and system logs for crashes or heap-related errors around network operations; inspect process memory dumps and core files for signs of corruption after the publication date.

What your security team should do

• Prioritize patching all instances within 30 days given public exploit maturity
• Scan build pipelines and package repositories for the vulnerable commit hash
• Monitor downstream dependents for updated releases incorporating the fix
• Apply network egress controls on curl-using services until patched