CVE-2025-0647 Other in C1-Premium
Attackers can exploit stale TLB entries in specific Arm CPUs to bypass memory isolation, potentially reading sensitive data or circumventing security controls.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-0647?
CVE-2025-0647 is a high-severity vulnerability in Arm C1-Premium, published on 14 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In certain Arm CPUs, a CPP RCTX instruction executed on one Processing Element (PE) may inhibit TLB invalidation when a TLBI is issued to the PE, either by the same PE or another PE in the shareability domain. In this case, the PE may retain stale TLB entries which should have been invalidated by the TLBI.
Weakness: CWE-226
Which versions are affected by CVE-2025-0647?
It affects 11 products.
Products include Arm C1-Premium Firmware, Arm C1-Ultra Firmware, Arm Cortex-A710 Firmware, Arm Cortex-X2 Firmware, Arm Cortex-X3 Firmware, Arm Cortex-X4 Firmware and 5 more.
How do I fix CVE-2025-0647?
Apply the vendor's patch.
Is CVE-2025-0647 being exploited?
There is no known exploitation of CVE-2025-0647 in the wild and no public exploit code.
Other vulnerabilities in Arm C1-Premium
Sources
Also known as DEBIAN-CVE-2025-0647, GHSA-xxhx-7292-7rv8.