{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/cell.c",
            "fs/afs/internal.h",
            "fs/afs/security.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5613bde937dfac6725e9c3fc766b9d6b8481e55b",
              "status": "affected",
              "version": "7e33b15d5a6578a99ebf189cea34983270ae92dd",
              "versionType": "git"
            },
            {
              "lessThan": "d27c71257825dced46104eefe42e4d9964bd032e",
              "status": "affected",
              "version": "330e2c514823008b22e6afd2055715bc46dd8d55",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/cell.c",
            "fs/afs/internal.h",
            "fs/afs/security.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6.17.11",
              "status": "affected",
              "version": "6.17.9",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.11",
                  "versionStartIncluding": "6.17.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix delayed allocation of a cell\u0027s anonymous key\n\nThe allocation of a cell\u0027s 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\u0027t just overlap the cell\nname by prepending it with \"afs@\" as the cell name already has a \u0027.\u0027\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\u0027t\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\u0027t currently cache a negative lookup, but it\u0027s\nprobably worth some investigation to see if NULL can be used instead."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-16T15:06:18.246Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5613bde937dfac6725e9c3fc766b9d6b8481e55b"
        },
        {
          "url": "https://git.kernel.org/stable/c/d27c71257825dced46104eefe42e4d9964bd032e"
        }
      ],
      "title": "afs: Fix delayed allocation of a cell\u0027s anonymous key",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68299",
    "datePublished": "2025-12-16T15:06:18.246Z",
    "dateReserved": "2025-12-16T14:48:05.293Z",
    "dateUpdated": "2025-12-16T15:06:18.246Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68299\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T16:16:09.400\",\"lastModified\":\"2025-12-18T15:08:06.237\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nafs: Fix delayed allocation of a cell\u0027s anonymous key\\n\\nThe allocation of a cell\u0027s 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\u0027t just overlap the cell\\nname by prepending it with \\\"afs@\\\" as the cell name already has a \u0027.\u0027\\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\u0027t\\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\u0027t currently cache a negative lookup, but it\u0027s\\nprobably worth some investigation to see if NULL can be used instead.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5613bde937dfac6725e9c3fc766b9d6b8481e55b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d27c71257825dced46104eefe42e4d9964bd032e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}