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

Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-08-05 12:33
VLAI
Title
thunderbolt: Validate XDomain request packet size before type cast
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.
Severity
8.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
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)
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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)
guessed Create a notification for this product.
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    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T14:36:42+00:00",
      "cve": "CVE-2026-53147",
      "id": "CVE-2026-53147",
      "initial_release_date": "2026-06-25T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: thunderbolt: Validate XDomain request packet size before type cast",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53147.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:11:29Z",
      "cve": "CVE-2026-53147",
      "id": "CVE-2026-53147",
      "initial_release_date": "2026-06-26T02:12:10Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "643",
      "product_status:known_not_affected": "23",
      "product_status:recommended": "273",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53147",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53147.json",
      "version": "13"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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.