{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90140",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.789Z",
        "datePublished": "2026-09-17T16:06:37.824Z",
        "dateUpdated": "2026-10-19T08:58:38.281Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:58:38.281Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncuse: wait for pending RCU callbacks on module exit\n\nSince commit 053fc4f755ad (\"fuse: fix UAF in rcu pathwalks\"),\nfuse_conn_put() frees the fuse_conn through call_rcu() rather than\nsynchronously.  For cuse, fc->release is cuse_fc_release(), which\nlives in the cuse module.  If the module is removed before the RCU\ngrace period ends, the callback jumps into freed module memory:\n\n      userspace / module unload      |        RCU softirq\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n close(/dev/cuse)                    |\n  cuse_channel_release()             |\n   fuse_dev_release()                |\n    fuse_conn_put(fch->conn)         |\n     call_rcu(delayed_release) ------+---> callback queued\n                                     |\n rmmod cuse                          |\n  cuse_exit()                        |\n   cuse_channel_destroy()            |\n   ...                               |\n   return                            |\n                                     |\n <module text freed>                 |\n                                     |  rcu_do_batch()\n                                     |   delayed_release()\n                                     |    fc->release()\n                                     |     -> cuse_fc_release()\n                                     |        ^^^ freed text!\n\nThe freed module text is unmapped by vfree(), so the jump into the\nstale callback triggers a page-fault Oops.  If the virtual address\nis subsequently reused, the callback could execute unrelated code\n(undefined behaviour).\n\nFix this by calling rcu_barrier() in cuse_exit() so that any pending\nfuse_conn release callback completes before the module is removed."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/fuse/cuse.c"
                    ],
                    "versions": [
                        {
                            "version": "bfbab62ca69f72bcd14ea30de1fb98f6080ad464",
                            "lessThan": "7fe415e1cd8fa875be263670c0ab47109818abb6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a8f650b93e55764ca9ff8e1ddebc151f57024086",
                            "lessThan": "45ae914b2f6ea56fc2f1c017fdee4e995bcb4c0e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "535e9bd0e8f8d8cfdc29de7cdb902b5041427fe6",
                            "lessThan": "ac5c499413385cea3e0220d6050408d50842891d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "053fc4f755ad43cf35210677bcba798ccdc48d0c",
                            "lessThan": "a1b46aee33d83f14ed62d7fdef1a91d3e0b732a9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "053fc4f755ad43cf35210677bcba798ccdc48d0c",
                            "lessThan": "389bd349ddbcf90dbd8a4f2a4ab6e552d53df134",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "053fc4f755ad43cf35210677bcba798ccdc48d0c",
                            "lessThan": "c40f3f24839f8404325a2099e26c2a04786ae309",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "053fc4f755ad43cf35210677bcba798ccdc48d0c",
                            "lessThan": "4deb3edead0c0e172cc7349e8855d741d3c5e162",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.15.166",
                            "lessThan": "5.15.221",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.107",
                            "lessThan": "6.1.188",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.48",
                            "lessThan": "6.6.157",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/fuse/cuse.c"
                    ],
                    "versions": [
                        {
                            "version": "6.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "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": "5.15.166",
                                    "versionEndExcluding": "5.15.221"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.107",
                                    "versionEndExcluding": "6.1.188"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6.48",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.8",
                                    "versionEndExcluding": "6.12.110"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.8",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.8",
                                    "versionEndExcluding": "7.3"
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                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/7fe415e1cd8fa875be263670c0ab47109818abb6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/45ae914b2f6ea56fc2f1c017fdee4e995bcb4c0e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ac5c499413385cea3e0220d6050408d50842891d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a1b46aee33d83f14ed62d7fdef1a91d3e0b732a9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/389bd349ddbcf90dbd8a4f2a4ab6e552d53df134"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c40f3f24839f8404325a2099e26c2a04786ae309"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4deb3edead0c0e172cc7349e8855d741d3c5e162"
                }
            ],
            "title": "cuse: wait for pending RCU callbacks on module exit",
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    }
}