fkie_cve-2021-47559
Vulnerability from fkie_nvd
Published
2024-05-24 15:15
Modified
2024-11-21 06:36
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk()
Coverity reports a possible NULL dereferencing problem:
in smc_vlan_by_tcpsk():
6. returned_null: netdev_lower_get_next returns NULL (checked 29 out of 30 times).
7. var_assigned: Assigning: ndev = NULL return value from netdev_lower_get_next.
1623 ndev = (struct net_device *)netdev_lower_get_next(ndev, &lower);
CID 1468509 (#1 of 1): Dereference null return value (NULL_RETURNS)
8. dereference: Dereferencing a pointer that might be NULL ndev when calling is_vlan_dev.
1624 if (is_vlan_dev(ndev)) {
Remove the manual implementation and use netdev_walk_all_lower_dev() to
iterate over the lower devices. While on it remove an obsolete function
parameter comment.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
"configurations": [
{
"nodes": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "835BC6F8-85B4-4718-9DE2-261C7D68F1B4",
"versionEndExcluding": "5.10.83",
"versionStartIncluding": "4.18",
"vulnerable": true
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "990C08FB-0121-4296-896F-556312F8FF3B",
"versionEndExcluding": "5.15.6",
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"negate": false,
"operator": "OR"
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk()\n\nCoverity reports a possible NULL dereferencing problem:\n\nin smc_vlan_by_tcpsk():\n6. returned_null: netdev_lower_get_next returns NULL (checked 29 out of 30 times).\n7. var_assigned: Assigning: ndev = NULL return value from netdev_lower_get_next.\n1623 ndev = (struct net_device *)netdev_lower_get_next(ndev, \u0026lower);\nCID 1468509 (#1 of 1): Dereference null return value (NULL_RETURNS)\n8. dereference: Dereferencing a pointer that might be NULL ndev when calling is_vlan_dev.\n1624 if (is_vlan_dev(ndev)) {\n\nRemove the manual implementation and use netdev_walk_all_lower_dev() to\niterate over the lower devices. While on it remove an obsolete function\nparameter comment."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/smc: corrige la desreferenciaci\u00f3n del puntero NULL en smc_vlan_by_tcpsk() Coverity informa un posible problema de desreferenciaci\u00f3n de NULL: en smc_vlan_by_tcpsk(): 6. return_null: netdev_lower_get_next devuelve NULL (comprobado 29 de 30 veces). 7. var_assigned: Asignaci\u00f3n: ndev = valor de retorno NULL de netdev_lower_get_next. 1623 ndev = (struct net_device *)netdev_lower_get_next(ndev, \u0026amp;lower); CID 1468509 (#1 de 1): Desreferenciar valor de retorno nulo (NULL_RETURNS) 8. desreferencia: Desreferenciar un puntero que podr\u00eda ser NULL ndev al llamar a is_vlan_dev. 1624 if (is_vlan_dev(ndev)) { Elimine la implementaci\u00f3n manual y use netdev_walk_all_lower_dev() para iterar sobre los dispositivos inferiores. Mientras est\u00e9 en \u00e9l, elimine un comentario de par\u00e1metro de funci\u00f3n obsoleto."
}
],
"id": "CVE-2021-47559",
"lastModified": "2024-11-21T06:36:33.313",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
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"published": "2024-05-24T15:15:20.537",
"references": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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"url": "https://git.kernel.org/stable/c/587acad41f1bc48e16f42bb2aca63bf323380be8"
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"url": "https://git.kernel.org/stable/c/bb851d0fb02547d03cd40106b5f2391c4fed6ed1"
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"url": "https://git.kernel.org/stable/c/c94cbd262b6aa3b54d73a1ed1f9c0d19df57f4ff"
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
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"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.