CVE-2025-38456

What it actually does

Invalid intf list iterator leads to atomic_dec on an invalid pointer in ipmi_create_user, causing memory corruption when the correct intf->intf_num is not located.

Why it matters to the business

Potential kernel memory corruption can result in system instability, crashes, or privilege escalation on affected Linux systems, with downstream GStreamer package exposure increasing risk across media processing workloads; multiple related kernel privilege escalation campaigns heighten urgency despite low EPSS.

How an attack unfolds

An attacker invokes ipmi_create_user with a non-matching intf_num, triggering the flawed shutdown or user-count path that performs atomic_dec on an invalid pointer; this corrupts memory and can be chained with campaigns such as Advanced Spyware Campaign, VMSCAPE, or other listed Linux kernel privilege escalation techniques to gain elevated access.

How to fix it

Upgrade gst-plugins-good1.0 to 1.26.2-1 on Debian 13; update gstreamer/gstreamer to commit 100c21e1faf68efe7f3830b6e9f856760697ab48; rebuild and redeploy affected packages after applying the kernel fix.

How to confirm the fix worked

Confirm package versions match the listed fixed releases, verify ipmi_create_user no longer performs atomic_dec on invalid pointers via code review or kernel build tests, and run regression tests on IPMI user creation paths.

Typical attack path

1. Identify systems exposing IPMI or GStreamer-dependent services
2. Craft call to ipmi_create_user with invalid intf_num to hit the flawed iterator path
3. Trigger in_shutdown or user-count decrement on invalid pointer
4. Exploit resulting memory corruption for code execution or escalation

How to detect it

Review kernel logs and audit trails for IPMI user creation failures or unexpected atomic operations; correlate with threat actor TTPs from Advanced Spyware Campaign or VMSCAPE; inspect process crashes or memory error reports post-ipmi_create_user calls.

What your security team should do

• Prioritize patching GStreamer and dependent packages within 30 days given related active campaigns
• Monitor EPSS trend and apply kernel updates immediately on exposed hosts
• Audit IPMI usage and restrict unnecessary user creation interfaces
• Incorporate memory-corruption detection into kernel fuzzing and CI pipelines