{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64260",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T15:36:31.774Z",
        "datePublished": "2026-07-25T08:49:11.395Z",
        "dateUpdated": "2026-08-17T04:52:13.575Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T04:52:13.575Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse-uring: Avoid queue->stopped races and set/read that value under lock\n\nThere are several readers of queue->stopped that check the value\nunder lock, but fuse_uring_commit_fetch() did not and actually\nthe value was not set under the lock in fuse_uring_abort_end_requests()\neither. Especially in fuse_uring_commit_fetch it is important\nto check under a lock, because due to races 'struct fuse_req'\nmight be freed with fuse_request_end, but another thread/cpu\nmight already do teardown work."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The flaw is reached locally by submitting IORING_OP_URING_CMD/FUSE_IO_URING_CMD_COMMIT_AND_FETCH operations on an attached /dev/fuse descriptor.\nAC:L - Once FUSE-over-io-uring is enabled, the attacker controls both race participants by issuing commit SQEs while concurrently aborting or unmounting the connection.\nPR:L - An ordinary user can create a FUSE mount through FS_USERNS_MOUNT and user namespaces, submit commands through /dev/fuse, and access the user-owned fusectl abort control without init-namespace capabilities.\nUI:N - The attacker can create the mount, generate FUSE requests, submit commits, and trigger teardown without another user's participation.\nS:U - This is a standard local kernel privilege-escalation condition within the kernel's security authority, not a guest-to-host or IOMMU boundary escape.\nC:H - The race causes a fuse_req use-after-free and double-end with stale list, pointer, and refcount accesses, which can be leveraged to disclose arbitrary kernel memory.\nI:H - Teardown writes through stale list pointers, flags, error fields, and refcounts and can corrupt or double-free a reallocated fuse_req, enabling arbitrary kernel writes or control-flow hijacking.\nA:H - The use-after-free, list corruption, and double-ending of requests can cause an oops, panic, deadlock, or complete system compromise."
                        }
                    ]
                }
            ],
            "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": "4a9bfb9b6850fec0685447aed280533cf980de70",
                            "lessThan": "39c8e925b207afceffaa5382416ed405e0223a03",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a9bfb9b6850fec0685447aed280533cf980de70",
                            "lessThan": "4021a3a79eee551d95fe1e1e7c1b195d34ba8c08",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a9bfb9b6850fec0685447aed280533cf980de70",
                            "lessThan": "b70a3aca16934c196f92abb17b01c1647b9bb63c",
                            "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": "6.18.39",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.4",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.18.39"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14",
                                    "versionEndExcluding": "7.1.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/39c8e925b207afceffaa5382416ed405e0223a03"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4021a3a79eee551d95fe1e1e7c1b195d34ba8c08"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b70a3aca16934c196f92abb17b01c1647b9bb63c"
                }
            ],
            "title": "fuse-uring: Avoid queue->stopped races and set/read that value under lock",
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                "engine": "bippy-1.2.0"
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}