CVE-2026-80858

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80858", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.797Z", "datePublished": "2026-09-04T15:55:12.442Z", "dateUpdated": "2026-10-19T08:44:52.217Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:44:52.217Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/fuse/dev_uring.c"], "versions": [{"version": "24fe962c86f55347385933a1b06ca71b60854690", "lessThan": "a5bb215dbc34b4c6a5e144ea1416bf66450d519f", "status": "affected", "versionType": "git"}, {"version": "24fe962c86f55347385933a1b06ca71b60854690", "lessThan": "a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa", "status": "affected", "versionType": "git"}, {"version": "24fe962c86f55347385933a1b06ca71b60854690", "lessThan": "42df916e5a5f8fb4b60c8cefb54318d1ec02c580", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/fuse/dev_uring.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.3", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a5bb215dbc34b4c6a5e144ea1416bf66450d519f"}, {"url": "https://git.kernel.org/stable/c/a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa"}, {"url": "https://git.kernel.org/stable/c/42df916e5a5f8fb4b60c8cefb54318d1ec02c580"}], "title": "fuse: publish io-uring queues with release semantics", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/fuse/dev_uring.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a5bb215dbc34b4c6a5e144ea1416bf66450d519f", "status": "affected", "version": "24fe962c86f55347385933a1b06ca71b60854690", "versionType": "git"}, {"lessThan": "a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa", "status": "affected", "version": "24fe962c86f55347385933a1b06ca71b60854690", "versionType": "git"}, {"lessThan": "42df916e5a5f8fb4b60c8cefb54318d1ec02c580", "status": "affected", "version": "24fe962c86f55347385933a1b06ca71b60854690", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/fuse/dev_uring.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-80858", "lastModified": "2026-10-19T09:17:21.487", "metrics": {}, "published": "2026-09-04T16:18:14.940", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/42df916e5a5f8fb4b60c8cefb54318d1ec02c580"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5bb215dbc34b4c6a5e144ea1416bf66450d519f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[24fe962c86f55347385933a1b06ca71b60854690,a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[24fe962c86f55347385933a1b06ca71b60854690,42df916e5a5f8fb4b60c8cefb54318d1ec02c580)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.3,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-04T19:30:04.992181+00:00", "updated": "2026-09-05T01:15:14.348979+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362", "CWE-758"]}