CVE-2026-53337 (GCVE-0-2026-53337)

Vulnerability from cvelistv5 – Published: 2026-07-01 13:32 – Updated: 2026-07-01 13:32
VLAI
Title
net: bonding: fix NULL pointer dereference in bond_do_ioctl()
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e2a7420df2e01370b40e4cf7b85ab9a885c6d755 , < 1b7558c85493467b2ea20738866b822db6442034 (git)
Affected: e2a7420df2e01370b40e4cf7b85ab9a885c6d755 , < b02b2e3e876c18733b868a29064abd11cdbf8feb (git)
Affected: e2a7420df2e01370b40e4cf7b85ab9a885c6d755 , < 66693957bacd1c9dae6188a7312d6be69a221f2d (git)
Affected: e2a7420df2e01370b40e4cf7b85ab9a885c6d755 , < a629418d463fb50d132a1aa063b0105857311e5f (git)
Affected: e2a7420df2e01370b40e4cf7b85ab9a885c6d755 , < c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba (git)
Affected: e2a7420df2e01370b40e4cf7b85ab9a885c6d755 , < bcb8fad90f27300add583a8371db504b766d95c7 (git)
Affected: e2a7420df2e01370b40e4cf7b85ab9a885c6d755 , < b0878106ddc486375084145848ff255dedfff46a (git)
Affected: e2a7420df2e01370b40e4cf7b85ab9a885c6d755 , < a764b0e8317a863006e05732e1aefe821b9d8c2d (git)
Create a notification for this product.
Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-01T13:32:19.046Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1b7558c85493467b2ea20738866b822db6442034"
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        {
          "url": "https://git.kernel.org/stable/c/a764b0e8317a863006e05732e1aefe821b9d8c2d"
        }
      ],
      "title": "net: bonding: fix NULL pointer dereference in bond_do_ioctl()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53337",
    "datePublished": "2026-07-01T13:32:19.046Z",
    "dateReserved": "2026-06-09T07:44:35.399Z",
    "dateUpdated": "2026-07-01T13:32:19.046Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-07-02",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53337\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-01T14:16:41.667\",\"lastModified\":\"2026-07-01T14:16:41.667\",\"vulnStatus\":\"Received\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/bonding/bond_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e2a7420df2e01370b40e4cf7b85ab9a885c6d755\",\"lessThan\":\"1b7558c85493467b2ea20738866b822db6442034\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2a7420df2e01370b40e4cf7b85ab9a885c6d755\",\"lessThan\":\"b02b2e3e876c18733b868a29064abd11cdbf8feb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2a7420df2e01370b40e4cf7b85ab9a885c6d755\",\"lessThan\":\"66693957bacd1c9dae6188a7312d6be69a221f2d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2a7420df2e01370b40e4cf7b85ab9a885c6d755\",\"lessThan\":\"a629418d463fb50d132a1aa063b0105857311e5f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2a7420df2e01370b40e4cf7b85ab9a885c6d755\",\"lessThan\":\"c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2a7420df2e01370b40e4cf7b85ab9a885c6d755\",\"lessThan\":\"bcb8fad90f27300add583a8371db504b766d95c7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2a7420df2e01370b40e4cf7b85ab9a885c6d755\",\"lessThan\":\"b0878106ddc486375084145848ff255dedfff46a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2a7420df2e01370b40e4cf7b85ab9a885c6d755\",\"lessThan\":\"a764b0e8317a863006e05732e1aefe821b9d8c2d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/bonding/bond_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.3\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.3\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.259\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.210\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.176\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.143\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.94\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.36\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.13\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.