CVE-2022-49290 (GCVE-0-2022-49290)
Vulnerability from cvelistv5
Published
2025-02-26 01:56
Modified
2025-05-04 12:44
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mac80211: fix potential double free on mesh join While commit 6a01afcf8468 ("mac80211: mesh: Free ie data when leaving mesh") fixed a memory leak on mesh leave / teardown it introduced a potential memory corruption caused by a double free when rejoining the mesh: ieee80211_leave_mesh() -> kfree(sdata->u.mesh.ie); ... ieee80211_join_mesh() -> copy_mesh_setup() -> old_ie = ifmsh->ie; -> kfree(old_ie); This double free / kernel panics can be reproduced by using wpa_supplicant with an encrypted mesh (if set up without encryption via "iw" then ifmsh->ie is always NULL, which avoids this issue). And then calling: $ iw dev mesh0 mesh leave $ iw dev mesh0 mesh join my-mesh Note that typically these commands are not used / working when using wpa_supplicant. And it seems that wpa_supplicant or wpa_cli are going through a NETDEV_DOWN/NETDEV_UP cycle between a mesh leave and mesh join where the NETDEV_UP resets the mesh.ie to NULL via a memcpy of default_mesh_setup in cfg80211_netdev_notifier_call, which then avoids the memory corruption, too. The issue was first observed in an application which was not using wpa_supplicant but "Senf" instead, which implements its own calls to nl80211. Fixing the issue by removing the kfree()'ing of the mesh IE in the mesh join function and leaving it solely up to the mesh leave to free the mesh IE.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/12e407a8ef17623823fd0c066fbd7f103953d28dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/273ebddc5fda2967492cb0b6cdd7d81cfb821b76Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3bbd0000d012f92aec423b224784fbf0f7bf40f8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46bb87d40683337757a2f902fcd4244b32bb4e86Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/582d8c60c0c053684f7138875e8150d5749ffc17Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d3ff9542a40ce034416bca03864709540a36016Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/615716af8644813355e014314a0bc1e961250f5aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c1d9c3628ef0a0ca197595d0f9e01cd3b5dda186Patch
Impacted products
Vendor Product Version
Linux Linux Version: 3212d6248faf0efce6b7a718e198feecce0eea05
Version: 86e7d4cd2ed5f4b0188afce8199faffcf1ae7c7e
Version: 37bccfa89559a70c044b5ccde3c916a91388e14a
Version: 3f15e3e62c80e180282f0cbc5559264e11c328b7
Version: 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20
Version: 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20
Version: 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20
Version: 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20
Version: 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20
Version: 12e9cb1e7c93413112260991d094cfda712fdc97
Version: 4f3193e08602462a806e8f53212e79c60a6f7488
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   Linux Linux Version: 5.8
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmac80211: fix potential double free on mesh join\n\nWhile commit 6a01afcf8468 (\"mac80211: mesh: Free ie data when leaving\nmesh\") fixed a memory leak on mesh leave / teardown it introduced a\npotential memory corruption caused by a double free when rejoining the\nmesh:\n\n  ieee80211_leave_mesh()\n  -\u003e kfree(sdata-\u003eu.mesh.ie);\n  ...\n  ieee80211_join_mesh()\n  -\u003e copy_mesh_setup()\n     -\u003e old_ie = ifmsh-\u003eie;\n     -\u003e kfree(old_ie);\n\nThis double free / kernel panics can be reproduced by using wpa_supplicant\nwith an encrypted mesh (if set up without encryption via \"iw\" then\nifmsh-\u003eie is always NULL, which avoids this issue). And then calling:\n\n  $ iw dev mesh0 mesh leave\n  $ iw dev mesh0 mesh join my-mesh\n\nNote that typically these commands are not used / working when using\nwpa_supplicant. And it seems that wpa_supplicant or wpa_cli are going\nthrough a NETDEV_DOWN/NETDEV_UP cycle between a mesh leave and mesh join\nwhere the NETDEV_UP resets the mesh.ie to NULL via a memcpy of\ndefault_mesh_setup in cfg80211_netdev_notifier_call, which then avoids\nthe memory corruption, too.\n\nThe issue was first observed in an application which was not using\nwpa_supplicant but \"Senf\" instead, which implements its own calls to\nnl80211.\n\nFixing the issue by removing the kfree()\u0027ing of the mesh IE in the mesh\njoin function and leaving it solely up to the mesh leave to free the\nmesh IE."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-05-04T12:44:25.773Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        {
          "url": "https://git.kernel.org/stable/c/4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3"
        }
      ],
      "title": "mac80211: fix potential double free on mesh join",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49290",
    "datePublished": "2025-02-26T01:56:27.500Z",
    "dateReserved": "2025-02-26T01:49:39.302Z",
    "dateUpdated": "2025-05-04T12:44:25.773Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49290\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:05.853\",\"lastModified\":\"2025-04-14T20:07:47.107\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmac80211: fix potential double free on mesh join\\n\\nWhile commit 6a01afcf8468 (\\\"mac80211: mesh: Free ie data when leaving\\nmesh\\\") fixed a memory leak on mesh leave / teardown it introduced a\\npotential memory corruption caused by a double free when rejoining the\\nmesh:\\n\\n  ieee80211_leave_mesh()\\n  -\u003e kfree(sdata-\u003eu.mesh.ie);\\n  ...\\n  ieee80211_join_mesh()\\n  -\u003e copy_mesh_setup()\\n     -\u003e old_ie = ifmsh-\u003eie;\\n     -\u003e kfree(old_ie);\\n\\nThis double free / kernel panics can be reproduced by using wpa_supplicant\\nwith an encrypted mesh (if set up without encryption via \\\"iw\\\" then\\nifmsh-\u003eie is always NULL, which avoids this issue). And then calling:\\n\\n  $ iw dev mesh0 mesh leave\\n  $ iw dev mesh0 mesh join my-mesh\\n\\nNote that typically these commands are not used / working when using\\nwpa_supplicant. And it seems that wpa_supplicant or wpa_cli are going\\nthrough a NETDEV_DOWN/NETDEV_UP cycle between a mesh leave and mesh join\\nwhere the NETDEV_UP resets the mesh.ie to NULL via a memcpy of\\ndefault_mesh_setup in cfg80211_netdev_notifier_call, which then avoids\\nthe memory corruption, too.\\n\\nThe issue was first observed in an application which was not using\\nwpa_supplicant but \\\"Senf\\\" instead, which implements its own calls to\\nnl80211.\\n\\nFixing the issue by removing the kfree()\u0027ing of the mesh IE in the mesh\\njoin function and leaving it solely up to the mesh leave to free the\\nmesh IE.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mac80211: arregla una posible doble liberaci\u00f3n al unirse a la malla Si bien el commit 6a01afcf8468 (\\\"mac80211: mesh: Free ie data when leaving mesh\\\") corrigi\u00f3 una p\u00e9rdida de memoria al salir/desmontar la malla, introdujo una posible corrupci\u00f3n de memoria causada por una doble liberaci\u00f3n al volver a unirse a la malla: ieee80211_leave_mesh() -\u0026gt; kfree(sdata-\u0026gt;u.mesh.ie); ... ieee80211_join_mesh() -\u0026gt; copy_mesh_setup() -\u0026gt; old_ie = ifmsh-\u0026gt;ie; -\u0026gt; kfree(old_ie); Esta doble liberaci\u00f3n/kernel panics se puede reproducir usando wpa_supplicant con una malla cifrada (si se configura sin cifrado a trav\u00e9s de \\\"iw\\\", entonces ifmsh-\u0026gt;ie siempre es NULL, lo que evita este problema). Y luego llamar a: $ iw dev mesh0 mesh leave $ iw dev mesh0 mesh join my-mesh Tenga en cuenta que normalmente estos comandos no se usan/funcionan cuando se usa wpa_supplicant. Y parece que wpa_supplicant o wpa_cli est\u00e1n pasando por un ciclo NETDEV_DOWN/NETDEV_UP entre un mesh leave y un mesh join donde NETDEV_UP restablece mesh.ie a NULL a trav\u00e9s de un memcpy de default_mesh_setup en cfg80211_netdev_notifier_call, que luego tambi\u00e9n evita la corrupci\u00f3n de memoria. El problema se observ\u00f3 por primera vez en una aplicaci\u00f3n que no usaba wpa_supplicant sino \\\"Senf\\\", que implementa sus propias llamadas a nl80211. Se solucion\u00f3 el problema eliminando el kfree()\u0027ing del IE de malla en la funci\u00f3n de uni\u00f3n de malla y dejando \u00fanicamente en manos del mesh leave la liberaci\u00f3n del IE de malla.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-415\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.4.233\",\"versionEndExcluding\":\"4.5\",\"matchCriteriaId\":\"8B4E143B-22A3-4A08-963A-D5E42624F2E9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.9.233\",\"versionEndExcluding\":\"4.9.309\",\"matchCriteriaId\":\"14421A1A-D085-43A1-8CC3-2D6145AC0DD0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.14.192\",\"versionEndExcluding\":\"4.14.274\",\"matchCriteriaId\":\"C5F6E8E5-D867-498F-AE3A-92A6EAEE7980\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.137\",\"versionEndExcluding\":\"4.19.237\",\"matchCriteriaId\":\"2EAAEEBF-40FA-40A0-AF06-1DBBA2D03F1B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.56\",\"versionEndExcluding\":\"5.4.188\",\"matchCriteriaId\":\"AC24F2DA-E1C4-4D50-8C6B-F8CFCB58136D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.7.13\",\"versionEndExcluding\":\"5.10.109\",\"matchCriteriaId\":\"1B924A24-75E2-4683-A92C-5C51F9036DEC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.32\",\"matchCriteriaId\":\"3191B916-53BD-46E6-AE21-58197D35768E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.16.18\",\"matchCriteriaId\":\"C86410A0-E312-4F41-93E9-929EAFB31757\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"5.17.1\",\"matchCriteriaId\":\"3004D9BF-0093-4C9C-8560-F3E91AFAE409\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/12e407a8ef17623823fd0c066fbd7f103953d28d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/273ebddc5fda2967492cb0b6cdd7d81cfb821b76\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3bbd0000d012f92aec423b224784fbf0f7bf40f8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/46bb87d40683337757a2f902fcd4244b32bb4e86\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/582d8c60c0c053684f7138875e8150d5749ffc17\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5d3ff9542a40ce034416bca03864709540a36016\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/615716af8644813355e014314a0bc1e961250f5a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c1d9c3628ef0a0ca197595d0f9e01cd3b5dda186\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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