thunderbolt: Validate XDomain request packet size before type cast

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Summary

CVECVE-2026-53147
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:32 UTC
Updated2026-06-28 08:16:35 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001800000 probability, percentile 0.078160000 (date 2026-06-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 a770e62923090d7572f1f5a8507ae551d354a057 git Not specified
CNA Linux Linux affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 0dd61ba03d05187726ecdf9c0e2175a81b9b24f6 git Not specified
CNA Linux Linux affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 79235c8add5da4bf27a12f5a5dbb579f300c059e git Not specified
CNA Linux Linux affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 46da5c3ea011e884028a91cf913db093920a915b git Not specified
CNA Linux Linux affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 07cd2787cdf8942d24a1a3ef81aa89b526fb6381 git Not specified
CNA Linux Linux affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 a504b9f2797b739e0304d537e8aa4ce883ecce39 git Not specified
CNA Linux Linux affected 4.15 Not specified
CNA Linux Linux unaffected 4.15 semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.94 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

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