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CVE-2026-53147

Full vulnerability record from the local CVENow database.

Description

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
HIGH
CVSS score
8.1 (v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-06-25 09:16:32.037000
Last modified
2026-10-19 20:19:05.763000
View original CVE JSON 
{
  "id": "CVE-2026-53147",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-06-25T09:16:32.037",
  "lastModified": "2026-10-19T20:19:05.763",
  "vulnStatus": "Modified",
  "cveTags": [],
  "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."
    }
  ],
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      "affectedData": [
        {
          "vendor": "Siemens",
          "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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  "metrics": {
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          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
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          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
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          "integrityImpact": "NONE",
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          "id": "CVE-2026-53147",
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          "role": "CISA Coordinator",
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  "weaknesses": [
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}