{"id":"CVE-2026-80858","revision":"448263ee9bd6407ca724d1195405ae52","records":[{"revision":"448263ee9bd6407ca724d1195405ae52","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80858","aliases":[],"title":"fuse: publish io-uring queues with release semantics","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.","state":0,"publishedAt":"2026-09-04T15:55:12.442+00:00","modifiedAt":"2026-10-19T08:44:52.217+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/fuse/dev_uring.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"24fe962c86f55347385933a1b06ca71b60854690\",\n                            \"lessThan\": \"a5bb215dbc34b4c6a5e144ea1416bf66450d519f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"24fe962c86f55347385933a1b06ca71b60854690\",\n                            \"lessThan\": \"a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"24fe962c86f55347385933a1b06ca71b60854690\",\n                            \"lessThan\": \"42df916e5a5f8fb4b60c8cefb54318d1ec02c580\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/fuse/dev_uring.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.51\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.3\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/a5bb215dbc34b4c6a5e144ea1416bf66450d519f","https://git.kernel.org/stable/c/a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa","https://git.kernel.org/stable/c/42df916e5a5f8fb4b60c8cefb54318d1ec02c580"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80858","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80858","identifiers":["CVE-2026-80858"]},"retained":false,"historicalAffected":[]}],"coverage":[]}