Vulnerability-Lookup

FKIE_CVE-2025-38545

Vulnerability from fkie_nvd - Published: 2025-08-16 12:15 - Updated: 2026-07-30 06:23

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: ethernet: ti: am65-cpsw-nuss: Fix skb size by accounting for skb_shared_info While transitioning from netdev_alloc_ip_align() to build_skb(), memory for the "skb_shared_info" member of an "skb" was not allocated. Fix this by allocating "PAGE_SIZE" as the skb length, accounting for the packet length, headroom and tailroom, thereby including the required memory space for skb_shared_info.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/02c4d6c26f1f662da8885b299c224ca6628ad232	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7d6ca0c8c0caf9a13cae2de763bb1f2a9ea7eabb	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fc2fffa2facac15ce711e95f98f954426e025bc5	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16
linux	linux_kernel	6.16

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/ti/am65-cpsw-nuss.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fc2fffa2facac15ce711e95f98f954426e025bc5",
              "status": "affected",
              "version": "8acacc40f7337527ff84cd901ed2ef0a2b95b2b6",
              "versionType": "git"
            },
            {
              "lessThan": "7d6ca0c8c0caf9a13cae2de763bb1f2a9ea7eabb",
              "status": "affected",
              "version": "8acacc40f7337527ff84cd901ed2ef0a2b95b2b6",
              "versionType": "git"
            },
            {
              "lessThan": "02c4d6c26f1f662da8885b299c224ca6628ad232",
              "status": "affected",
              "version": "8acacc40f7337527ff84cd901ed2ef0a2b95b2b6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/ti/am65-cpsw-nuss.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
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              "versionEndExcluding": "6.12.39",
              "versionStartIncluding": "6.10",
              "vulnerable": true
            },
            {
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            },
            {
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              "vulnerable": true
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              "matchCriteriaId": "A0517869-312D-4429-80C2-561086E1421C",
              "vulnerable": true
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ti: am65-cpsw-nuss: Fix skb size by accounting for skb_shared_info\n\nWhile transitioning from netdev_alloc_ip_align() to build_skb(), memory\nfor the \"skb_shared_info\" member of an \"skb\" was not allocated. Fix this\nby allocating \"PAGE_SIZE\" as the skb length, accounting for the packet\nlength, headroom and tailroom, thereby including the required memory space\nfor skb_shared_info."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: ethernet: ti: am65-cpsw-nuss: Se corrige el tama\u00f1o de skb teniendo en cuenta skb_shared_info. Durante la transici\u00f3n de netdev_alloc_ip_align() a build_skb(), no se asign\u00f3 memoria para el miembro \"skb_shared_info\" de un \"skb\". Para solucionar esto, se asigna \"PAGE_SIZE\" como la longitud de skb, teniendo en cuenta la longitud del paquete, el margen de maniobra y el margen de maniobra, incluyendo as\u00ed el espacio de memoria necesario para skb_shared_info."
    }
  ],
  "id": "CVE-2025-38545",
  "lastModified": "2026-07-30T06:23:25.143",
  "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",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "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"
      }
    ]
  },
  "published": "2025-08-16T12:15:30.500",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/02c4d6c26f1f662da8885b299c224ca6628ad232"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-38545 (GCVE-0-2025-38545)

Vulnerability from cvelistv5 – Published: 2025-08-16 11:22 – Updated: 2026-08-05 12:02

Title

net: ethernet: ti: am65-cpsw-nuss: Fix skb size by accounting for skb_shared_info

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

3 references

URL	Tags
https://git.kernel.org/stable/c/fc2fffa2facac15ce…
https://git.kernel.org/stable/c/7d6ca0c8c0caf9a13…
https://git.kernel.org/stable/c/02c4d6c26f1f662da…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 , < fc2fffa2facac15ce711e95f98f954426e025bc5 (git) Affected: 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 , < 7d6ca0c8c0caf9a13cae2de763bb1f2a9ea7eabb (git) Affected: 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 , < 02c4d6c26f1f662da8885b299c224ca6628ad232 (git)
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 6.12.39 , ≤ 6.12.* (semver) Unaffected: 6.15.7 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/ti/am65-cpsw-nuss.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fc2fffa2facac15ce711e95f98f954426e025bc5",
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            },
            {
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              "status": "affected",
              "version": "8acacc40f7337527ff84cd901ed2ef0a2b95b2b6",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "8acacc40f7337527ff84cd901ed2ef0a2b95b2b6",
              "versionType": "git"
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ti: am65-cpsw-nuss: Fix skb size by accounting for skb_shared_info\n\nWhile transitioning from netdev_alloc_ip_align() to build_skb(), memory\nfor the \"skb_shared_info\" member of an \"skb\" was not allocated. Fix this\nby allocating \"PAGE_SIZE\" as the skb length, accounting for the packet\nlength, headroom and tailroom, thereby including the required memory space\nfor skb_shared_info."
        }
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          },
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            {
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              "value": "AV:N - The vulnerable code is the am65-cpsw RX NAPI path, entered solely by processing a received Ethernet frame, and the panic threshold (1704 bytes) is below the driver\u0027s supported max_mtu of 2002, so an ordinary routed IP datagram from a remote host triggers it on any port configured with an MTU above ~1690.\nAC:L - The attacker only needs to get a frame larger than 1704 bytes delivered to the interface; the hardware RX_MAXLEN is fixed at 2024 independent of the configured MTU, so even at the default MTU an oversized frame is accepted and DMA\u0027d, and the resulting skb_put() overflow is deterministic with no race or memory-layout dependency.\nPR:N - The crash happens in am65_cpsw_nuss_rx_packets() before eth_type_trans() and any protocol or socket demultiplexing, so no credentials, sockets, or local access of any kind are required \u2014 a broadcast or unicast frame to the port\u0027s MAC suffices.\nUI:N - Packet reception and NAPI polling are entirely automatic; no action by any local or remote user is needed once the interface is up.\nS:U - The BUG() and resulting panic occur in the kernel of the receiving host, affecting only resources managed by that same security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:N - skb-\u003eend is understated rather than overstated, so no out-of-bounds read occurs \u2014 skb_put()\u0027s bounds check fires before any data past the allocation is touched, and packets at or below 1704 bytes end exactly at the skb_shared_info boundary with no overlap.\nI:N - There is no out-of-bounds write: skb_shared_info and the entire DMA buffer stay within the order-0 page, the page is never in the DMA ring while a live skb references it, and the oversize case aborts at the skb_put() check rather than corrupting adjacent memory.\nA:H - Any frame exceeding 1704 bytes drives skb_put() past skb-\u003eend into skb_over_panic() -\u003e BUG() from softirq context, which on arm64 becomes \"Fatal exception in interrupt\" and panics the machine; it is remotely and repeatably triggerable."
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        },
        {
          "url": "https://git.kernel.org/stable/c/02c4d6c26f1f662da8885b299c224ca6628ad232"
        }
      ],
      "title": "net: ethernet: ti: am65-cpsw-nuss: Fix skb size by accounting for skb_shared_info",
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        "engine": "bippy-1.2.0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38545",
    "datePublished": "2025-08-16T11:22:19.459Z",
    "dateReserved": "2025-04-16T04:51:24.024Z",
    "dateUpdated": "2026-08-05T12:02:47.780Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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FKIE_CVE-2025-38545

CVE-2025-38545 (GCVE-0-2025-38545)

Tags

Sightings

Nomenclature

Related by attack behaviour