# CVE-2026-72154: linux: In the Linux kernel, the following vulnerability has been resolved:  openrisc: Fix jump_label smp syncing  The origin...

CVE-2026-72154 is fixed in linux on 1 platform by DEBIAN-CVE-2026-72154 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-72154
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  openrisc: Fix jump_label smp syncing  The original commit 8c30b0018f9d ("openrisc: Add jump label support") copies from arm64 and does not properly consider how icache invalidation on remote cores works in OpenRISC.  On OpenRISC remote icaches need to be invalidated otherwise static key's may remain state after updating.  Fix SMP cache syncing by:   1. Properly invalidate remote core icaches on SMP systems by using     icache_all_inv.  The old code uses kick_all_cpus_sync() which runs a     no-op IPI function call on remote CPU's which does execute a lot of     code and flushes many cache lines in the process, but does not flush     all and it's not correct on OpenRISC.  2. For architectures that do not have WRITETHROUGH caches be sure     to flush the dcache after patching.  To test this I first reproduced the issue using a custom test module [0].  The test confirmed that some icache lines maintained stale static_key code sequences after calling static_branch_enable().  After this patch there are no longer jump_label coherency issues.  [0] https://github.com/stffrdhrn/or1k-utils/tree/master/tests/smp_static_key_test

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-72154](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72154.md) | Aug 15, 2026 |

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