vulnerability
Debian: CVE-2021-47152: linux -- security update
Severity | CVSS | Published | Added | Modified |
---|---|---|---|---|
10 | (AV:N/AC:L/Au:N/C:C/I:C/A:C) | 03/25/2024 | 07/30/2024 | 03/17/2025 |
Description
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix data stream corruption
Maxim reported several issues when forcing a TCP transparent proxy
to use the MPTCP protocol for the inbound connections. He also
provided a clean reproducer.
The problem boils down to 'mptcp_frag_can_collapse_to()' assuming
that only MPTCP will use the given page_frag.
If others - e.g. the plain TCP protocol - allocate page fragments,
we can end-up re-using already allocated memory for mptcp_data_frag.
Fix the issue ensuring that the to-be-expanded data fragment is
located at the current page frag end.
v1 -> v2:
- added missing fixes tag (Mat)
Solution

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