Vulnerability-Lookup

FKIE_CVE-2022-49997

Vulnerability from fkie_nvd - Published: 2025-06-18 11:15 - Updated: 2026-08-04 10:18

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: net: lantiq_xrx200: restore buffer if memory allocation failed In a situation where memory allocation fails, an invalid buffer address is stored. When this descriptor is used again, the system panics in the build_skb() function when accessing memory.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3ef2786e32d93e562cd40601248a14ae090de873	Patch
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c9c3b1775f80fa21f5bff874027d2ccb10f5d90c	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.13
linux	linux_kernel	5.13
linux	linux_kernel	6.0
linux	linux_kernel	6.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/lantiq_xrx200.c"
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              "versionType": "git"
            },
            {
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            },
            {
              "status": "affected",
              "version": "217395c5ab15e92a4fd84fe77fab6b0b1bb4e456",
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            },
            {
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              "version": "70c8418469fb22a679fe5015ebe60fe15011ea43",
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              "version": "5.12.13",
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            }
          ]
        },
        {
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          "product": "Linux",
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          ],
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          "vendor": "Linux",
          "versions": [
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            },
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    }
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  "descriptions": [
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: lantiq_xrx200: restore buffer if memory allocation failed\n\nIn a situation where memory allocation fails, an invalid buffer address\nis stored. When this descriptor is used again, the system panics in the\nbuild_skb() function when accessing memory."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: lantiq_xrx200: restaurar el b\u00fafer si falla la asignaci\u00f3n de memoria. En caso de fallo en la asignaci\u00f3n de memoria, se almacena una direcci\u00f3n de b\u00fafer no v\u00e1lida. Al volver a utilizar este descriptor, el sistema entra en p\u00e1nico en la funci\u00f3n build_skb() al acceder a la memoria."
    }
  ],
  "id": "CVE-2022-49997",
  "lastModified": "2026-08-04T10:18:02.527",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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          "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": "2025-06-18T11:15:27.447",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
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    },
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2022-49997 (GCVE-0-2022-49997)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:00 – Updated: 2026-08-05 08:57

Title

net: lantiq_xrx200: restore buffer if memory allocation failed

Summary

Severity

7.5 (High)


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

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/3ef2786e32d93e562…
https://git.kernel.org/stable/c/c9c3b1775f80fa21f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7ea6cd16f1599c1eac6018751eadbc5fc736b99a , < 3ef2786e32d93e562cd40601248a14ae090de873 (git) Affected: 7ea6cd16f1599c1eac6018751eadbc5fc736b99a , < c9c3b1775f80fa21f5bff874027d2ccb10f5d90c (git) Affected: 217395c5ab15e92a4fd84fe77fab6b0b1bb4e456 (git) Affected: 70c8418469fb22a679fe5015ebe60fe15011ea43 (git) Affected: 5e006cdb9b759f604c4fc69b410aab37cf45f5b4 (git) Affected: 5.4.128 , < 5.5 (semver) Affected: 5.10.46 , < 5.11 (semver) Affected: 5.12.13 , < 5.13 (semver)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 5.19.6 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/lantiq_xrx200.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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            {
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          "product": "Linux",
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              "value": "AV:N - The vulnerable code is the Lantiq XRX200 Ethernet PMAC NAPI RX path, reached solely by frames arriving on the wire to the CPU port of VRX200 DSL gateways; a remote attacker\u2019s packets both induce RX buffer refill and later reuse the poisoned descriptor with no local access required.\nAC:L - An attacker can reliably create the triggering condition by flooding a memory-constrained embedded gateway until napi_alloc_frag fails, permanently storing NULL in that ring slot; any subsequent received frame that reuses the descriptor then crashes, with no uncontrolled race or layout dependency.\nPR:N - There is no authentication, capability check, or credential gate between frame arrival and xrx200_hw_receive()/xrx200_alloc_buf()\u2014reception runs in softirq/NAPI before any socket-level authorization, so unauthenticated network traffic suffices.\nUI:N - The RX path runs autonomously in NAPI/softirq whenever frames arrive; no local user must open a device, mount anything, or take any action for the NULL dereference to occur.\nS:U - The panic and its consequences stay within the host kernel\u2019s security authority on the affected gateway; there is no VM escape, IOMMU bypass, or other cross-boundary impact.\nC:N - build_skb(NULL) faults while constructing skb_shared_info at a low address derived from a NULL head and aborts without returning kernel memory, pointers, or freed-object contents to the attacker.\nI:N - This is a stored NULL software pointer followed by a NULL dereference in build_skb, not an attacker-controlled out-of-bounds/UAF write or type confusion; execution aborts before any control-flow hijack or data-modification primitive is obtained.\nA:H - The NULL pointer dereference occurs in softirq/NAPI context and panics the kernel as described in the fix, fully denying service on the device and remaining re-triggerable after reboot under the same traffic load."
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    "dateUpdated": "2026-08-05T08:57:05.467Z",
    "state": "PUBLISHED"
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  "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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2022-49997

CVE-2022-49997 (GCVE-0-2022-49997)

Tags

Sightings

Nomenclature

Related by attack behaviour