Bug 2492756 (CVE-2026-53148) - CVE-2026-53148 kernel: thunderbolt: Clamp XDomain response data copy to allocation size
Summary: CVE-2026-53148 kernel: thunderbolt: Clamp XDomain response data copy to alloc...
Keywords:
Status: NEW
Alias: CVE-2026-53148
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-25 10:04 UTC by OSIDB Bzimport
Modified: 2026-06-25 23:27 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-06-25 10:04:05 UTC
In the Linux kernel, the following vulnerability has been resolved:

thunderbolt: Clamp XDomain response data copy to allocation size

tb_xdp_properties_request() derives the per-packet copy length from
the response header without checking that it fits in the previously
allocated data buffer.  A malicious peer can set its length field
larger than the declared data_length, causing memcpy to write past
the kcalloc allocation.

Clamp the per-packet copy length so that the cumulative offset
never exceeds data_len.


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