Vulnerability-Lookup

GHSA-RWC6-QV5W-3MRV

Vulnerability from github – Published: 2025-10-01 09:30 – Updated: 2025-12-12 21:31

Details

In the Linux kernel, the following vulnerability has been resolved:

net: xilinx: axienet: Add error handling for RX metadata pointer retrieval

Add proper error checking for dmaengine_desc_get_metadata_ptr() which can return an error pointer and lead to potential crashes or undefined behaviour if the pointer retrieval fails.

Properly handle the error by unmapping DMA buffer, freeing the skb and returning early to prevent further processing with invalid data.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39897"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-01T08:15:32Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: xilinx: axienet: Add error handling for RX metadata pointer retrieval\n\nAdd proper error checking for dmaengine_desc_get_metadata_ptr() which\ncan return an error pointer and lead to potential crashes or undefined\nbehaviour if the pointer retrieval fails.\n\nProperly handle the error by unmapping DMA buffer, freeing the skb and\nreturning early to prevent further processing with invalid data.",
  "id": "GHSA-rwc6-qv5w-3mrv",
  "modified": "2025-12-12T21:31:32Z",
  "published": "2025-10-01T09:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39897"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bbceba7dc5090c00105e006ce28d1292cfda8dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92e2fc92bc4eb2bc0e84404316fbc02ddd0a3196"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0ecda6fdd840b406df6617b003b036f65dd8926"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-39897 (GCVE-0-2025-39897)

Vulnerability from cvelistv5 – Published: 2025-10-01 07:42 – Updated: 2026-08-05 12:05

Title

net: xilinx: axienet: Add error handling for RX metadata pointer retrieval

Summary

In the Linux kernel, the following vulnerability has been resolved: net: xilinx: axienet: Add error handling for RX metadata pointer retrieval Add proper error checking for dmaengine_desc_get_metadata_ptr() which can return an error pointer and lead to potential crashes or undefined behaviour if the pointer retrieval fails. Properly handle the error by unmapping DMA buffer, freeing the skb and returning early to prevent further processing with invalid data.

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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-14 19:28 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6856 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/d0ecda6fdd840b406…
https://git.kernel.org/stable/c/92e2fc92bc4eb2bc0…
https://git.kernel.org/stable/c/8bbceba7dc5090c00…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6a91b846af85a24241decd686269e8e038eb13d1 , < d0ecda6fdd840b406df6617b003b036f65dd8926 (git) Affected: 6a91b846af85a24241decd686269e8e038eb13d1 , < 92e2fc92bc4eb2bc0e84404316fbc02ddd0a3196 (git) Affected: 6a91b846af85a24241decd686269e8e038eb13d1 , < 8bbceba7dc5090c00105e006ce28d1292cfda8dd (git)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.12.46 , ≤ 6.12.* (semver) Unaffected: 6.16.6 , ≤ 6.16.* (semver) Unaffected: 6.17 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-39897",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T19:28:46.346333Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:33:13.992Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/xilinx/xilinx_axienet_main.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d0ecda6fdd840b406df6617b003b036f65dd8926",
              "status": "affected",
              "version": "6a91b846af85a24241decd686269e8e038eb13d1",
              "versionType": "git"
            },
            {
              "lessThan": "92e2fc92bc4eb2bc0e84404316fbc02ddd0a3196",
              "status": "affected",
              "version": "6a91b846af85a24241decd686269e8e038eb13d1",
              "versionType": "git"
            },
            {
              "lessThan": "8bbceba7dc5090c00105e006ce28d1292cfda8dd",
              "status": "affected",
              "version": "6a91b846af85a24241decd686269e8e038eb13d1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/xilinx/xilinx_axienet_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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                },
                {
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                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                }
              ],
              "negate": false,
              "operator": "OR"
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: xilinx: axienet: Add error handling for RX metadata pointer retrieval\n\nAdd proper error checking for dmaengine_desc_get_metadata_ptr() which\ncan return an error pointer and lead to potential crashes or undefined\nbehaviour if the pointer retrieval fails.\n\nProperly handle the error by unmapping DMA buffer, freeing the skb and\nreturning early to prevent further processing with invalid data."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable code is the RX completion callback of the Xilinx AXI Ethernet driver, reached purely by receiving a frame on the NIC, with no local access required. Any remote host able to send traffic that reaches the interface \u2014 including routed internet traffic to these FPGA-based embedded/industrial network devices \u2014 drives the faulting path.\nAC:L - In the affected configuration the error pointer is returned on every RX completion, so the very first packet the attacker sends deterministically triggers the fault \u2014 no race, no memory-layout grooming, no timing window. The attacker needs only to cause a single frame to arrive.\nPR:N - The RX DMA callback runs on unauthenticated inbound frames long before any protocol, socket, or credential check; the packet is not even parsed yet. No account, capability, or namespace access on the target is needed.\nUI:N - Packet reception and DMA completion processing are fully automatic within the driver\u0027s interrupt/tasklet path. No local user has to open, mount, configure, or interact with anything.\nS:U - The fault occurs in kernel code and its consequences are confined to the same kernel security authority \u2014 there is no hypervisor, IOMMU, or sandbox boundary crossed. This is a standard in-kernel driver defect.\nC:N - The dereference targets an ERR_PTR value in the permanently unmapped top page of the address space, so the load faults immediately and returns no data to the attacker. Execution never reaches the subsequent skb_put()/__netif_rx() that could have exposed adjacent heap contents, and the pointer value is fixed by driver state rather than attacker-controlled, so no read primitive exists.\nI:N - The bug is a single invalid read; there is no out-of-bounds write, no freed-object reuse, and no type confusion, so no kernel memory is modified. The faulting access aborts before any state-changing operation on the skb or the DMA ring.\nA:H - Dereferencing the error pointer causes a kernel oops from axienet_dma_rx_cb(), which executes in the dmaengine tasklet (softirq) context \u2014 a fatal exception in interrupt context that panics the machine. On affected systems this is a remotely triggerable, repeatable full denial of service of a network device that is often the only link to an embedded or industrial controller."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:05:58.614Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/d0ecda6fdd840b406df6617b003b036f65dd8926"
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          "url": "https://git.kernel.org/stable/c/92e2fc92bc4eb2bc0e84404316fbc02ddd0a3196"
        },
        {
          "url": "https://git.kernel.org/stable/c/8bbceba7dc5090c00105e006ce28d1292cfda8dd"
        }
      ],
      "title": "net: xilinx: axienet: Add error handling for RX metadata pointer retrieval",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39897",
    "datePublished": "2025-10-01T07:42:45.593Z",
    "dateReserved": "2025-04-16T07:20:57.146Z",
    "dateUpdated": "2026-08-05T12:05:58.614Z",
    "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.

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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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