Bug 2492764 (CVE-2026-53149) - CVE-2026-53149 kernel: thunderbolt: Bound root directory content to block size
Summary: CVE-2026-53149 kernel: thunderbolt: Bound root directory content to block size
Keywords:
Status: NEW
Alias: CVE-2026-53149
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
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: 2026-06-26 09:25 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-06-25 10:04:30 UTC
In the Linux kernel, the following vulnerability has been resolved:

thunderbolt: Bound root directory content to block size

__tb_property_parse_dir() does not check that content_offset +
content_len fits within block_len for the root directory case.
When rootdir->length equals or exceeds block_len - 2, the entry
loop reads past the allocated property block.

Add a bounds check after computing content_offset and content_len
to reject directories whose content extends past the block.


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