{"apiVersion":"1.0","identifier":"CVE-2026-72154","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","publishedAt":"2026-08-15T06:21:33","lastModifiedAt":"2026-08-17T06:18:15","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72154","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00173,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72154","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72154","en":"https://www.redsauce.net/en/cves/CVE-2026-72154","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72154","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72154","de":"https://www.redsauce.net/de/cves/CVE-2026-72154","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72154","el":"https://www.redsauce.net/el/cves/CVE-2026-72154"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72154"}}