Vulnerability-Lookup

FKIE_CVE-2022-49667

Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2026-06-17 05:18

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

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/050133e1aa2cb49bb17be847d48a4431598ef562	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2765749def4765c5052a4c66445cf4c96fcccdbc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/63b2fe509f69b90168a75e04e14573dccf7984e6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/893825289ba840afd86bfffcb6f7f363c73efff8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b90ac60303063a43e17dd4aec159067599d255e6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ef0af7d08d26c5333ff4944a559279464edf6f15	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f162f7c348fa2a5555bafdb5cc890b89b221e69c	Patch

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

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/bonding/bond_3ad.c"
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          "vendor": "Linux",
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.322",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.287",
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            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.251",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.204",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.129",
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            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.53",
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            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
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              "vulnerable": true
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          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "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": "2026-06-17T05:18:47.747",
  "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-49667",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-02-27T18:15:14.271545Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-02-26T07:01:41.687",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/050133e1aa2cb49bb17be847d48a4431598ef562"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/2765749def4765c5052a4c66445cf4c96fcccdbc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/63b2fe509f69b90168a75e04e14573dccf7984e6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/893825289ba840afd86bfffcb6f7f363c73efff8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b90ac60303063a43e17dd4aec159067599d255e6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/ef0af7d08d26c5333ff4944a559279464edf6f15"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/f162f7c348fa2a5555bafdb5cc890b89b221e69c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2022-49667 (GCVE-0-2022-49667)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:24 – Updated: 2026-08-05 08:55

Title

net: bonding: fix use-after-free after 802.3ad slave unbind

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-27 18:15 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6848 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/a853b7a3a9fd1d74a…
https://git.kernel.org/stable/c/b90ac60303063a43e…
https://git.kernel.org/stable/c/f162f7c348fa2a555…
https://git.kernel.org/stable/c/893825289ba840afd…
https://git.kernel.org/stable/c/63b2fe509f69b9016…
https://git.kernel.org/stable/c/ef0af7d08d26c5333…
https://git.kernel.org/stable/c/2765749def4765c50…
https://git.kernel.org/stable/c/050133e1aa2cb49bb…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e (git) Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < b90ac60303063a43e17dd4aec159067599d255e6 (git) Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < f162f7c348fa2a5555bafdb5cc890b89b221e69c (git) Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < 893825289ba840afd86bfffcb6f7f363c73efff8 (git) Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < 63b2fe509f69b90168a75e04e14573dccf7984e6 (git) Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < ef0af7d08d26c5333ff4944a559279464edf6f15 (git) Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < 2765749def4765c5052a4c66445cf4c96fcccdbc (git) Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < 050133e1aa2cb49bb17be847d48a4431598ef562 (git)
Linux	Linux	Affected: 4.7 Unaffected: 0 , < 4.7 (semver) Unaffected: 4.9.322 , ≤ 4.9.* (semver) Unaffected: 4.14.287 , ≤ 4.14.* (semver) Unaffected: 4.19.251 , ≤ 4.19.* (semver) Unaffected: 5.4.204 , ≤ 5.4.* (semver) Unaffected: 5.10.129 , ≤ 5.10.* (semver) Unaffected: 5.15.53 , ≤ 5.15.* (semver) Unaffected: 5.18.10 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49667",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-27T18:15:14.271545Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-27T18:22:31.234Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/bonding/bond_3ad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e",
              "status": "affected",
              "version": "0622cab0341cac6b30da177b0faa39fae0680e71",
              "versionType": "git"
            },
            {
              "lessThan": "b90ac60303063a43e17dd4aec159067599d255e6",
              "status": "affected",
              "version": "0622cab0341cac6b30da177b0faa39fae0680e71",
              "versionType": "git"
            },
            {
              "lessThan": "f162f7c348fa2a5555bafdb5cc890b89b221e69c",
              "status": "affected",
              "version": "0622cab0341cac6b30da177b0faa39fae0680e71",
              "versionType": "git"
            },
            {
              "lessThan": "893825289ba840afd86bfffcb6f7f363c73efff8",
              "status": "affected",
              "version": "0622cab0341cac6b30da177b0faa39fae0680e71",
              "versionType": "git"
            },
            {
              "lessThan": "63b2fe509f69b90168a75e04e14573dccf7984e6",
              "status": "affected",
              "version": "0622cab0341cac6b30da177b0faa39fae0680e71",
              "versionType": "git"
            },
            {
              "lessThan": "ef0af7d08d26c5333ff4944a559279464edf6f15",
              "status": "affected",
              "version": "0622cab0341cac6b30da177b0faa39fae0680e71",
              "versionType": "git"
            },
            {
              "lessThan": "2765749def4765c5052a4c66445cf4c96fcccdbc",
              "status": "affected",
              "version": "0622cab0341cac6b30da177b0faa39fae0680e71",
              "versionType": "git"
            },
            {
              "lessThan": "050133e1aa2cb49bb17be847d48a4431598ef562",
              "status": "affected",
              "version": "0622cab0341cac6b30da177b0faa39fae0680e71",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/bonding/bond_3ad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.322",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.287",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.251",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.204",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.129",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.322",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.287",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.251",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.204",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.129",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.53",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.10",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF is triggered by bond slave release (SIOCBONDRELEASE/rtnetlink ndo_del_slave \u2192 bond_3ad_unbind_slave), which requires local netlink/ioctl access; LACPDU traffic alone cannot unbind slaves.\nAC:L - An attacker who can manage the bond fully controls the trigger sequence\u2014create an 802.3ad bond, form multi-port aggregators via crafted LACPDUs on veth peers, force ports inactive, then unbind slaves\u2014so success does not depend on external timing or state.\nPR:L - Creating bonds, enslaving/releasing veth/dummy slaves, and related netlink ops only need CAP_NET_ADMIN in the network namespace\u2019s user_ns (ns_capable), which an unprivileged user obtains via user+net namespaces.\nUI:N - Exploitation is entirely attacker-driven through local namespace and interface operations; no separate victim action is required.\nS:U - Impact is kernel memory corruption and privilege escalation within the same host kernel authority, with no VM/IOMMU or cross-boundary escape.\nC:H - Use-after-free of heap-allocated struct ad_slave_info/aggregator lets an attacker reclaim and control the freed object, enabling arbitrary kernel reads.\nI:H - The same UAF is exploitable for heap spray and arbitrary write / control-flow hijacking in kernel context.\nA:H - The dangling aggregator pointer is dereferenced by bond_3ad_state_machine_handler (KASAN-confirmed), causing kernel oops/panic even without full exploitation."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:55:58.300Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e"
        },
        {
          "url": "https://git.kernel.org/stable/c/b90ac60303063a43e17dd4aec159067599d255e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/f162f7c348fa2a5555bafdb5cc890b89b221e69c"
        },
        {
          "url": "https://git.kernel.org/stable/c/893825289ba840afd86bfffcb6f7f363c73efff8"
        },
        {
          "url": "https://git.kernel.org/stable/c/63b2fe509f69b90168a75e04e14573dccf7984e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/ef0af7d08d26c5333ff4944a559279464edf6f15"
        },
        {
          "url": "https://git.kernel.org/stable/c/2765749def4765c5052a4c66445cf4c96fcccdbc"
        },
        {
          "url": "https://git.kernel.org/stable/c/050133e1aa2cb49bb17be847d48a4431598ef562"
        }
      ],
      "title": "net: bonding: fix use-after-free after 802.3ad slave unbind",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49667",
    "datePublished": "2025-02-26T02:24:01.818Z",
    "dateReserved": "2025-02-26T02:21:30.436Z",
    "dateUpdated": "2026-08-05T08:55:58.300Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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