{"cve":"CVE-2026-80858","nvd":{"published":"2026-09-04T16:18:14.940","modified":"2026-10-19T09:17:21.487","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: publish io-uring queues with release semantics\n\nfuse_uring_create_queue() initializes a fuse_ring_queue and then\npublishes the pointer into ring->queues[qid] with WRITE_ONCE() under the\nfch->lock. There are several readers that may concurrently be fetching\nthat pointer locklessly and then deferencing it.\n\nWRITE_ONCE() doesn't ensure ordering of the queue's field\ninitialization before the ring->queues[qid] pointer assignment. The\nqueue must be published with smp_store_release() so the field\ninitialization is guaranteed to happen before.\n\nReaders in paths where the read may happen concurrently with the store\nneed to use READ_ONCE() because any race involving a plain access is\nundefined.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/42df916e5a5f8fb4b60c8cefb54318d1ec02c580","https://git.kernel.org/stable/c/a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa","https://git.kernel.org/stable/c/a5bb215dbc34b4c6a5e144ea1416bf66450d519f"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-80858","score":0.00155,"percentile":0.0454,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}