fkie_cve-2022-49390
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-03-25 13:48
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: macsec: fix UAF bug for real_dev Create a new macsec device but not get reference to real_dev. That can not ensure that real_dev is freed after macsec. That will trigger the UAF bug for real_dev as following: ================================================================== BUG: KASAN: use-after-free in macsec_get_iflink+0x5f/0x70 drivers/net/macsec.c:3662 Call Trace: ... macsec_get_iflink+0x5f/0x70 drivers/net/macsec.c:3662 dev_get_iflink+0x73/0xe0 net/core/dev.c:637 default_operstate net/core/link_watch.c:42 [inline] rfc2863_policy+0x233/0x2d0 net/core/link_watch.c:54 linkwatch_do_dev+0x2a/0x150 net/core/link_watch.c:161 Allocated by task 22209: ... alloc_netdev_mqs+0x98/0x1100 net/core/dev.c:10549 rtnl_create_link+0x9d7/0xc00 net/core/rtnetlink.c:3235 veth_newlink+0x20e/0xa90 drivers/net/veth.c:1748 Freed by task 8: ... kfree+0xd6/0x4d0 mm/slub.c:4552 kvfree+0x42/0x50 mm/util.c:615 device_release+0x9f/0x240 drivers/base/core.c:2229 kobject_cleanup lib/kobject.c:673 [inline] kobject_release lib/kobject.c:704 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:721 netdev_run_todo+0x72e/0x10b0 net/core/dev.c:10327 After commit faab39f63c1f ("net: allow out-of-order netdev unregistration") and commit e5f80fcf869a ("ipv6: give an IPv6 dev to blackhole_netdev"), we can add dev_hold_track() in macsec_dev_init() and dev_put_track() in macsec_free_netdev() to fix the problem.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/196a888ca6571deb344468e1d7138e3273206335Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/78933cbc143b82d02330e00900d2fd08f2682f4ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d130282179aa6051449ac8f8df1115769998a665Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "344FEFB4-E393-4E04-905A-4734AC267EC1",
              "versionEndExcluding": "4.15",
              "versionStartIncluding": "4.14.154",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B7EACEB9-7173-47F4-83A4-AE06CE74D78B",
              "versionEndExcluding": "4.20",
              "versionStartIncluding": "4.19.84",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "ADA13345-8170-4521-B0CB-44DDF2C0713F",
              "versionEndExcluding": "5.17.15",
              "versionStartIncluding": "5.3.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2",
              "versionEndExcluding": "5.18.3",
              "versionStartIncluding": "5.18",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmacsec: fix UAF bug for real_dev\n\nCreate a new macsec device but not get reference to real_dev. That can\nnot ensure that real_dev is freed after macsec. That will trigger the\nUAF bug for real_dev as following:\n\n==================================================================\nBUG: KASAN: use-after-free in macsec_get_iflink+0x5f/0x70 drivers/net/macsec.c:3662\nCall Trace:\n ...\n macsec_get_iflink+0x5f/0x70 drivers/net/macsec.c:3662\n dev_get_iflink+0x73/0xe0 net/core/dev.c:637\n default_operstate net/core/link_watch.c:42 [inline]\n rfc2863_policy+0x233/0x2d0 net/core/link_watch.c:54\n linkwatch_do_dev+0x2a/0x150 net/core/link_watch.c:161\n\nAllocated by task 22209:\n ...\n alloc_netdev_mqs+0x98/0x1100 net/core/dev.c:10549\n rtnl_create_link+0x9d7/0xc00 net/core/rtnetlink.c:3235\n veth_newlink+0x20e/0xa90 drivers/net/veth.c:1748\n\nFreed by task 8:\n ...\n kfree+0xd6/0x4d0 mm/slub.c:4552\n kvfree+0x42/0x50 mm/util.c:615\n device_release+0x9f/0x240 drivers/base/core.c:2229\n kobject_cleanup lib/kobject.c:673 [inline]\n kobject_release lib/kobject.c:704 [inline]\n kref_put include/linux/kref.h:65 [inline]\n kobject_put+0x1c8/0x540 lib/kobject.c:721\n netdev_run_todo+0x72e/0x10b0 net/core/dev.c:10327\n\nAfter commit faab39f63c1f (\"net: allow out-of-order netdev unregistration\")\nand commit e5f80fcf869a (\"ipv6: give an IPv6 dev to blackhole_netdev\"), we\ncan add dev_hold_track() in macsec_dev_init() and dev_put_track() in\nmacsec_free_netdev() to fix the problem."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: macsec: se corrige el error UAF para real_dev Crea un nuevo dispositivo macsec pero no obtiene la referencia a real_dev. Esto no puede garantizar que real_dev se libere despu\u00e9s de macsec. Esto activar\u00e1 el error UAF para real_dev de la siguiente manera: ==================================================================== ERROR: KASAN: use-after-free in macsec_get_iflink+0x5f/0x70 drivers/net/macsec.c:3662 Call Trace: ... macsec_get_iflink+0x5f/0x70 drivers/net/macsec.c:3662 dev_get_iflink+0x73/0xe0 net/core/dev.c:637 default_operstate net/core/link_watch.c:42 [inline] rfc2863_policy+0x233/0x2d0 net/core/link_watch.c:54 linkwatch_do_dev+0x2a/0x150 net/core/link_watch.c:161 Allocated by task 22209: ... alloc_netdev_mqs+0x98/0x1100 net/core/dev.c:10549 rtnl_create_link+0x9d7/0xc00 net/core/rtnetlink.c:3235 veth_newlink+0x20e/0xa90 drivers/net/veth.c:1748 Freed by task 8: ... kfree+0xd6/0x4d0 mm/slub.c:4552 kvfree+0x42/0x50 mm/util.c:615 device_release+0x9f/0x240 drivers/base/core.c:2229 kobject_cleanup lib/kobject.c:673 [inline] kobject_release lib/kobject.c:704 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:721 netdev_run_todo+0x72e/0x10b0 net/core/dev.c:10327 After commit faab39f63c1f (\"net: allow out-of-order netdev unregistration\") and commit e5f80fcf869a (\"ipv6: give an IPv6 dev to blackhole_netdev\"), we can add dev_hold_track() in macsec_dev_init() and dev_put_track() in macsec_free_netdev() to fix the problem. "
    }
  ],
  "id": "CVE-2022-49390",
  "lastModified": "2025-03-25T13:48:09.850",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-02-26T07:01:15.620",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/196a888ca6571deb344468e1d7138e3273206335"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/78933cbc143b82d02330e00900d2fd08f2682f4e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d130282179aa6051449ac8f8df1115769998a665"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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