CVE-2026-72154: In the Linux kernel, the following vulnerability has been resolved: openrisc: Fix jump_label smp syncing The original
Summary
A bug in the Linux kernel's OpenRISC architecture prevented instruction cache (icache, the processor's fast memory that stores recently-used instructions) from being properly synchronized across multiple CPU cores when updating static keys (a kernel optimization technique that switches code paths at runtime). After an update, some cores would still execute old code because their caches weren't properly cleared.
Solution / Mitigation
Fix SMP cache syncing (synchronization across multiple processors) by: (1) Properly invalidate remote core icaches on SMP systems by using icache_all_inv instead of kick_all_cpus_sync(), and (2) For architectures without WRITETHROUGH caches (caches that write changes to main memory immediately), flush the dcache (data cache, the fast memory storing recently-used data) after patching the code.
Vulnerability Details
EPSS: 0.0%
August 15, 2026
Classification
Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-72154
First tracked: August 15, 2026 at 08:08 AM
Classified by LLM (prompt v3) · confidence: 95%