{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-68299",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-16T14:48:05.293Z",
        "datePublished": "2025-12-16T15:06:18.246Z",
        "dateUpdated": "2026-08-03T09:32:28.315Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-03T09:32:28.315Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix delayed allocation of a cell's anonymous key\n\nThe allocation of a cell's anonymous key is done in a background thread\nalong with other cell setup such as doing a DNS upcall.  In the reported\nbug, this is triggered by afs_parse_source() parsing the device name given\nto mount() and calling afs_lookup_cell() with the name of the cell.\n\nThe normal key lookup then tries to use the key description on the\nanonymous authentication key as the reference for request_key() - but it\nmay not yet be set and so an oops can happen.\n\nThis has been made more likely to happen by the fix for dynamic lookup\nfailure.\n\nFix this by firstly allocating a reference name and attaching it to the\nafs_cell record when the record is created.  It can share the memory\nallocation with the cell name (unfortunately it can't just overlap the cell\nname by prepending it with \"afs@\" as the cell name already has a '.'\nprepended for other purposes).  This reference name is then passed to\nrequest_key().\n\nSecondly, the anon key is now allocated on demand at the point a key is\nrequested in afs_request_key() if it is not already allocated.  A mutex is\nused to prevent multiple allocation for a cell.\n\nThirdly, make afs_request_key_rcu() return NULL if the anonymous key isn't\nyet allocated (if we need it) and then the caller can return -ECHILD to\ndrop out of RCU-mode and afs_request_key() can be called.\n\nNote that the anonymous key is kind of necessary to make the key lookup\ncache work as that doesn't currently cache a negative lookup, but it's\nprobably worth some investigation to see if NULL can be used instead."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/afs/cell.c",
                        "fs/afs/internal.h",
                        "fs/afs/security.c"
                    ],
                    "versions": [
                        {
                            "version": "fa4ccdccf1489a6dac4369a8c69f11b455b3355c",
                            "lessThan": "bd18d2cbc9377c6b270c0b7ea44b0e6ed1d99c07",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7e33b15d5a6578a99ebf189cea34983270ae92dd",
                            "lessThan": "5613bde937dfac6725e9c3fc766b9d6b8481e55b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "330e2c514823008b22e6afd2055715bc46dd8d55",
                            "lessThan": "d27c71257825dced46104eefe42e4d9964bd032e",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/afs/cell.c",
                        "fs/afs/internal.h",
                        "fs/afs/security.c"
                    ],
                    "versions": [
                        {
                            "version": "6.17.9",
                            "lessThan": "6.17.11",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17.9",
                                    "versionEndExcluding": "6.17.11"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/bd18d2cbc9377c6b270c0b7ea44b0e6ed1d99c07"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5613bde937dfac6725e9c3fc766b9d6b8481e55b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d27c71257825dced46104eefe42e4d9964bd032e"
                }
            ],
            "title": "afs: Fix delayed allocation of a cell's anonymous key",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}