fkie_cve-2022-49667
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-03-24 19:07
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: net: bonding: fix use-after-free after 802.3ad slave unbind commit 0622cab0341c ("bonding: fix 802.3ad aggregator reselection"), resolve case, when there is several aggregation groups in the same bond. bond_3ad_unbind_slave will invalidate (clear) aggregator when __agg_active_ports return zero. So, ad_clear_agg can be executed even, when num_of_ports!=0. Than bond_3ad_unbind_slave can be executed again for, previously cleared aggregator. NOTE: at this time bond_3ad_unbind_slave will not update slave ports list, because lag_ports==NULL. So, here we got slave ports, pointing to freed aggregator memory. Fix with checking actual number of ports in group (as was before commit 0622cab0341c ("bonding: fix 802.3ad aggregator reselection") ), before ad_clear_agg(). The KASAN logs are as follows: [ 767.617392] ================================================================== [ 767.630776] BUG: KASAN: use-after-free in bond_3ad_state_machine_handler+0x13dc/0x1470 [ 767.638764] Read of size 2 at addr ffff00011ba9d430 by task kworker/u8:7/767 [ 767.647361] CPU: 3 PID: 767 Comm: kworker/u8:7 Tainted: G O 5.15.11 #15 [ 767.655329] Hardware name: DNI AmazonGo1 A7040 board (DT) [ 767.660760] Workqueue: lacp_1 bond_3ad_state_machine_handler [ 767.666468] Call trace: [ 767.668930] dump_backtrace+0x0/0x2d0 [ 767.672625] show_stack+0x24/0x30 [ 767.675965] dump_stack_lvl+0x68/0x84 [ 767.679659] print_address_description.constprop.0+0x74/0x2b8 [ 767.685451] kasan_report+0x1f0/0x260 [ 767.689148] __asan_load2+0x94/0xd0 [ 767.692667] bond_3ad_state_machine_handler+0x13dc/0x1470
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/050133e1aa2cb49bb17be847d48a4431598ef562Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2765749def4765c5052a4c66445cf4c96fcccdbcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63b2fe509f69b90168a75e04e14573dccf7984e6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/893825289ba840afd86bfffcb6f7f363c73efff8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b90ac60303063a43e17dd4aec159067599d255e6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef0af7d08d26c5333ff4944a559279464edf6f15Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f162f7c348fa2a5555bafdb5cc890b89b221e69cPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.19
linux linux_kernel 5.19
linux linux_kernel 5.19
linux linux_kernel 5.19


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bonding: fix use-after-free after 802.3ad slave unbind\n\ncommit 0622cab0341c (\"bonding: fix 802.3ad aggregator reselection\"),\nresolve case, when there is several aggregation groups in the same bond.\nbond_3ad_unbind_slave will invalidate (clear) aggregator when\n__agg_active_ports return zero. So, ad_clear_agg can be executed even, when\nnum_of_ports!=0. Than bond_3ad_unbind_slave can be executed again for,\npreviously cleared aggregator. NOTE: at this time bond_3ad_unbind_slave\nwill not update slave ports list, because lag_ports==NULL. So, here we\ngot slave ports, pointing to freed aggregator memory.\n\nFix with checking actual number of ports in group (as was before\ncommit 0622cab0341c (\"bonding: fix 802.3ad aggregator reselection\") ),\nbefore ad_clear_agg().\n\nThe KASAN logs are as follows:\n\n[  767.617392] ==================================================================\n[  767.630776] BUG: KASAN: use-after-free in bond_3ad_state_machine_handler+0x13dc/0x1470\n[  767.638764] Read of size 2 at addr ffff00011ba9d430 by task kworker/u8:7/767\n[  767.647361] CPU: 3 PID: 767 Comm: kworker/u8:7 Tainted: G           O 5.15.11 #15\n[  767.655329] Hardware name: DNI AmazonGo1 A7040 board (DT)\n[  767.660760] Workqueue: lacp_1 bond_3ad_state_machine_handler\n[  767.666468] Call trace:\n[  767.668930]  dump_backtrace+0x0/0x2d0\n[  767.672625]  show_stack+0x24/0x30\n[  767.675965]  dump_stack_lvl+0x68/0x84\n[  767.679659]  print_address_description.constprop.0+0x74/0x2b8\n[  767.685451]  kasan_report+0x1f0/0x260\n[  767.689148]  __asan_load2+0x94/0xd0\n[  767.692667]  bond_3ad_state_machine_handler+0x13dc/0x1470"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: bonding: fix use-after-free after 802.3ad slave unbind commit 0622cab0341c (\"bonding: fix 802.3ad gregator reselection\"), resuelve el caso, cuando hay varios grupos de agregaci\u00f3n en el mismo enlace. bond_3ad_unbind_slave invalidar\u00e1 (borrar\u00e1) el agregador cuando __agg_active_ports devuelva cero. Por lo tanto, ad_clear_agg se puede ejecutar incluso, cuando num_of_ports!=0. Luego, bond_3ad_unbind_slave se puede ejecutar nuevamente para el agregador previamente borrado. NOTA: en este momento bond_3ad_unbind_slave no actualizar\u00e1 la lista de puertos esclavos, porque lag_ports==NULL. Entonces, aqu\u00ed tenemos puertos esclavos, apuntando a la memoria liberada del agregador. Correcci\u00f3n con la verificaci\u00f3n del n\u00famero real de puertos en el grupo (como era antes de el commit 0622cab0341c (\"vinculaci\u00f3n: correcci\u00f3n de la reselecci\u00f3n del agregador 802.3ad\")), antes de ad_clear_agg(). Los registros de KASAN son los siguientes: [ 767.617392] ================================================================== [ 767.630776] BUG: KASAN: use-after-free in bond_3ad_state_machine_handler+0x13dc/0x1470 [ 767.638764] Read of size 2 at addr ffff00011ba9d430 by task kworker/u8:7/767 [ 767.647361] CPU: 3 PID: 767 Comm: kworker/u8:7 Tainted: G O 5.15.11 #15 [ 767.655329] Hardware name: DNI AmazonGo1 A7040 board (DT) [ 767.660760] Workqueue: lacp_1 bond_3ad_state_machine_handler [ 767.666468] Call trace: [ 767.668930] dump_backtrace+0x0/0x2d0 [ 767.672625] show_stack+0x24/0x30 [ 767.675965] dump_stack_lvl+0x68/0x84 [ 767.679659] print_address_description.constprop.0+0x74/0x2b8 [ 767.685451] kasan_report+0x1f0/0x260 [ 767.689148] __asan_load2+0x94/0xd0 [ 767.692667] bond_3ad_state_machine_handler+0x13dc/0x1470 "
    }
  ],
  "id": "CVE-2022-49667",
  "lastModified": "2025-03-24T19:07:43.713",
  "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": "2025-02-26T07:01:41.687",
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  "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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}


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