{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-22989",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.937Z",
        "datePublished": "2026-01-23T15:24:10.523Z",
        "dateUpdated": "2026-05-11T21:57:50.971Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:57:50.971Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: check that server is running in unlock_filesystem\n\nIf we are trying to unlock the filesystem via an administrative\ninterface and nfsd isn't running, it crashes the server. This\nhappens currently because nfsd4_revoke_states() access state\nstructures (eg., conf_id_hashtbl) that has been freed as a part\nof the server shutdown.\n\n[   59.465072] Call trace:\n[   59.465308]  nfsd4_revoke_states+0x1b4/0x898 [nfsd] (P)\n[   59.465830]  write_unlock_fs+0x258/0x440 [nfsd]\n[   59.466278]  nfsctl_transaction_write+0xb0/0x120 [nfsd]\n[   59.466780]  vfs_write+0x1f0/0x938\n[   59.467088]  ksys_write+0xfc/0x1f8\n[   59.467395]  __arm64_sys_write+0x74/0xb8\n[   59.467746]  invoke_syscall.constprop.0+0xdc/0x1e8\n[   59.468177]  do_el0_svc+0x154/0x1d8\n[   59.468489]  el0_svc+0x40/0xe0\n[   59.468767]  el0t_64_sync_handler+0xa0/0xe8\n[   59.469138]  el0t_64_sync+0x1ac/0x1b0\n\nEnsure this can't happen by taking the nfsd_mutex and checking that\nthe server is still up, and then holding the mutex across the call to\nnfsd4_revoke_states()."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/nfsd/nfs4state.c",
                        "fs/nfsd/nfsctl.c",
                        "fs/nfsd/state.h"
                    ],
                    "versions": [
                        {
                            "version": "1ac3629bf012592cb0320e52a1cceb319a05ad17",
                            "lessThan": "d95499900fe52f3d461ed26b7a30bebea8f12914",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1ac3629bf012592cb0320e52a1cceb319a05ad17",
                            "lessThan": "e06c9f6c0f554148d4921c2a15bd054260a054ac",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1ac3629bf012592cb0320e52a1cceb319a05ad17",
                            "lessThan": "d0424066fcd294977f310964bed6f2a487fa4515",
                            "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/nfsd/nfs4state.c",
                        "fs/nfsd/nfsctl.c",
                        "fs/nfsd/state.h"
                    ],
                    "versions": [
                        {
                            "version": "6.9",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.9",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.66",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.6",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "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": "6.9",
                                    "versionEndExcluding": "6.12.66"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.9",
                                    "versionEndExcluding": "6.18.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.9",
                                    "versionEndExcluding": "6.19"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d95499900fe52f3d461ed26b7a30bebea8f12914"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e06c9f6c0f554148d4921c2a15bd054260a054ac"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d0424066fcd294977f310964bed6f2a487fa4515"
                }
            ],
            "title": "nfsd: check that server is running in unlock_filesystem",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}