FKIE_CVE-2026-53337

Vulnerability from fkie_nvd - Published: 2026-07-01 14:16 - Updated: 2026-07-01 14:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix NULL pointer dereference in bond_do_ioctl() In bond_do_ioctl(), slave_dev is obtained via __dev_get_by_name() which can return NULL if the requested interface name does not exist. However, the subsequent slave_dbg() call is placed before the NULL check: slave_dev = __dev_get_by_name(net, ifr->ifr_slave); slave_dbg(bond_dev, slave_dev, "slave_dev=%p:\n", slave_dev); //here if (!slave_dev) return -ENODEV; The slave_dbg() macro expands to netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ...) which unconditionally dereferences slave_dev->name before the NULL check is performed. This results in a NULL pointer dereference kernel oops when a user calls bonding ioctl (e.g. SIOCBONDENSLAVE, SIOCBONDRELEASE, etc.) with a non-existent slave interface name. This is reachable from userspace via the bonding ioctl interface with CAP_NET_ADMIN capability, making it a potential local denial-of-service vector. Fix by moving the slave_dbg() call after the NULL check.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b7558c85493467b2ea20738866b822db6442034
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/66693957bacd1c9dae6188a7312d6be69a221f2d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a629418d463fb50d132a1aa063b0105857311e5f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a764b0e8317a863006e05732e1aefe821b9d8c2d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b02b2e3e876c18733b868a29064abd11cdbf8feb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b0878106ddc486375084145848ff255dedfff46a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bcb8fad90f27300add583a8371db504b766d95c7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/bonding/bond_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1b7558c85493467b2ea20738866b822db6442034",
              "status": "affected",
              "version": "e2a7420df2e01370b40e4cf7b85ab9a885c6d755",
              "versionType": "git"
            },
            {
              "lessThan": "b02b2e3e876c18733b868a29064abd11cdbf8feb",
              "status": "affected",
              "version": "e2a7420df2e01370b40e4cf7b85ab9a885c6d755",
              "versionType": "git"
            },
            {
              "lessThan": "66693957bacd1c9dae6188a7312d6be69a221f2d",
              "status": "affected",
              "version": "e2a7420df2e01370b40e4cf7b85ab9a885c6d755",
              "versionType": "git"
            },
            {
              "lessThan": "a629418d463fb50d132a1aa063b0105857311e5f",
              "status": "affected",
              "version": "e2a7420df2e01370b40e4cf7b85ab9a885c6d755",
              "versionType": "git"
            },
            {
              "lessThan": "c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba",
              "status": "affected",
              "version": "e2a7420df2e01370b40e4cf7b85ab9a885c6d755",
              "versionType": "git"
            },
            {
              "lessThan": "bcb8fad90f27300add583a8371db504b766d95c7",
              "status": "affected",
              "version": "e2a7420df2e01370b40e4cf7b85ab9a885c6d755",
              "versionType": "git"
            },
            {
              "lessThan": "b0878106ddc486375084145848ff255dedfff46a",
              "status": "affected",
              "version": "e2a7420df2e01370b40e4cf7b85ab9a885c6d755",
              "versionType": "git"
            },
            {
              "lessThan": "a764b0e8317a863006e05732e1aefe821b9d8c2d",
              "status": "affected",
              "version": "e2a7420df2e01370b40e4cf7b85ab9a885c6d755",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/bonding/bond_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bonding: fix NULL pointer dereference in bond_do_ioctl()\n\nIn bond_do_ioctl(), slave_dev is obtained via __dev_get_by_name() which\ncan return NULL if the requested interface name does not exist. However,\nthe subsequent slave_dbg() call is placed before the NULL check:\n\n    slave_dev = __dev_get_by_name(net, ifr-\u003eifr_slave);\n    slave_dbg(bond_dev, slave_dev, \"slave_dev=%p:\\n\", slave_dev); //here\n    if (!slave_dev)\n        return -ENODEV;\n\nThe slave_dbg() macro expands to netdev_dbg(bond_dev, \"(slave %s): \" fmt,\n(slave_dev)-\u003ename, ...) which unconditionally dereferences slave_dev-\u003ename\nbefore the NULL check is performed. This results in a NULL pointer\ndereference kernel oops when a user calls bonding ioctl (e.g.\nSIOCBONDENSLAVE, SIOCBONDRELEASE, etc.) with a non-existent slave\ninterface name.\n\nThis is reachable from userspace via the bonding ioctl interface with\nCAP_NET_ADMIN capability, making it a potential local denial-of-service\nvector.\n\nFix by moving the slave_dbg() call after the NULL check."
    }
  ],
  "id": "CVE-2026-53337",
  "lastModified": "2026-07-01T14:16:41.667",
  "metrics": {},
  "published": "2026-07-01T14:16:41.667",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1b7558c85493467b2ea20738866b822db6442034"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/66693957bacd1c9dae6188a7312d6be69a221f2d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a629418d463fb50d132a1aa063b0105857311e5f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a764b0e8317a863006e05732e1aefe821b9d8c2d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b02b2e3e876c18733b868a29064abd11cdbf8feb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b0878106ddc486375084145848ff255dedfff46a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bcb8fad90f27300add583a8371db504b766d95c7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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