Vulnerability-Lookup

FKIE_CVE-2026-53147

Vulnerability from fkie_nvd - Published: 2026-06-25 09:16 - Updated: 2026-07-06 14:13

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Validate XDomain request packet size before type cast tb_xdp_handle_request() casts the received packet buffer to protocol-specific structs without verifying that the allocation is large enough for the target type. A peer can send a minimal XDomain packet that passes the generic header length check but is shorter than the struct accessed after the cast, causing out-of- bounds reads from the kmemdup allocation. Plumb the packet length through xdomain_request_work and validate it against the expected struct size before each cast.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0dd61ba03d05187726ecdf9c0e2175a81b9b24f6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a770e62923090d7572f1f5a8507ae551d354a057	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/thunderbolt/xdomain.c"
          ],
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          "vendor": "Linux",
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            },
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            {
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            },
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              "status": "unaffected",
              "version": "7.1",
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            }
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        }
      ],
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    }
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Validate XDomain request packet size before type cast\n\ntb_xdp_handle_request() casts the received packet buffer to\nprotocol-specific structs without verifying that the allocation\nis large enough for the target type.  A peer can send a minimal\nXDomain packet that passes the generic header length check but is\nshorter than the struct accessed after the cast, causing out-of-\nbounds reads from the kmemdup allocation.\n\nPlumb the packet length through xdomain_request_work and validate\nit against the expected struct size before each cast."
    }
  ],
  "id": "CVE-2026-53147",
  "lastModified": "2026-07-06T14:13:01.577",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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  "published": "2026-06-25T09:16:32.037",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-53147 (GCVE-0-2026-53147)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-08-05 12:33

Title

thunderbolt: Validate XDomain request packet size before type cast

Summary

Severity

8.1 (High)


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

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/a770e62923090d757…
https://git.kernel.org/stable/c/0dd61ba03d0518772…
https://git.kernel.org/stable/c/79235c8add5da4bf2…
https://git.kernel.org/stable/c/46da5c3ea011e8840…
https://git.kernel.org/stable/c/07cd2787cdf8942d2…
https://git.kernel.org/stable/c/a504b9f2797b739e0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: cdae7c07e3e3509eaabc18c1640a55dc5b99c179 , < a770e62923090d7572f1f5a8507ae551d354a057 (git) Affected: cdae7c07e3e3509eaabc18c1640a55dc5b99c179 , < 0dd61ba03d05187726ecdf9c0e2175a81b9b24f6 (git) Affected: cdae7c07e3e3509eaabc18c1640a55dc5b99c179 , < 79235c8add5da4bf27a12f5a5dbb579f300c059e (git) Affected: cdae7c07e3e3509eaabc18c1640a55dc5b99c179 , < 46da5c3ea011e884028a91cf913db093920a915b (git) Affected: cdae7c07e3e3509eaabc18c1640a55dc5b99c179 , < 07cd2787cdf8942d24a1a3ef81aa89b526fb6381 (git) Affected: cdae7c07e3e3509eaabc18c1640a55dc5b99c179 , < a504b9f2797b739e0304d537e8aa4ce883ecce39 (git)
Linux	Linux	Affected: 4.15 Unaffected: 0 , < 4.15 (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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/thunderbolt/xdomain.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Validate XDomain request packet size before type cast\n\ntb_xdp_handle_request() casts the received packet buffer to\nprotocol-specific structs without verifying that the allocation\nis large enough for the target type.  A peer can send a minimal\nXDomain packet that passes the generic header length check but is\nshorter than the struct accessed after the cast, causing out-of-\nbounds reads from the kmemdup allocation.\n\nPlumb the packet length through xdomain_request_work and validate\nit against the expected struct size before each cast."
        }
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          },
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              "lang": "en",
              "value": "AV:A - The vulnerable parser handles XDomain control packets from a directly connected Thunderbolt/USB4 peer on the same local fabric, not from a routable network. A malicious connected host, dock, or in-line device can send the malformed request packets.\nAC:L - The attacker controls the packet type, declared length, checksum, and payload size, and the generic header check accepts packets shorter than the later protocol-specific struct accesses. No race or condition outside attacker control is required once an XDomain peer is connected.\nPR:N - No target-system account or kernel capability is required; the packet is accepted from the external XDomain peer before any user credential check. XDomain must be enabled/allowed, but that is a platform configuration gate rather than attacker privilege.\nUI:N - After the malicious peer is connected, exploitation is driven entirely by packets sent over the Thunderbolt/USB4 control channel. No victim action such as opening a file or authorizing a user operation is required for the vulnerable parsing path.\nS:U - The impact is within the host kernel that processes the malformed XDomain packet. This is not a VM escape, IOMMU bypass, or cross-authority scope change.\nC:H - Short PROPERTIES_REQUEST packets cause reads past the kmemdup-allocated packet into adjacent kernel heap data, including UUID/offset fields used by the response logic. Under the required higher-severity rule for out-of-bounds reads, this is high confidentiality impact.\nI:N - The fixed bug is an out-of-bounds read before type-specific casts, not an out-of-bounds write or direct overwrite primitive. The affected paths may use the read value for response/link-state handling, but they do not provide attacker-controlled kernel memory modification.\nA:H - The malformed packet can drive kernel out-of-bounds heap reads from the control-channel workqueue and can be sent repeatedly by the peer. Such reads can fault or trigger kernel hardening/KASAN failures, so availability impact is high."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:33:30.626Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        },
        {
          "url": "https://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059e"
        },
        {
          "url": "https://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915b"
        },
        {
          "url": "https://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381"
        },
        {
          "url": "https://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39"
        }
      ],
      "title": "thunderbolt: Validate XDomain request packet size before type cast",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53147",
    "datePublished": "2026-06-25T08:38:33.547Z",
    "dateReserved": "2026-06-09T07:44:35.387Z",
    "dateUpdated": "2026-08-05T12:33:30.626Z",
    "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.

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-2026-53147

CVE-2026-53147 (GCVE-0-2026-53147)

Tags

Sightings

Nomenclature

Related by attack behaviour