These changes maybe surprising and need some documentation.

Signed-off-by: Stephen Hemminger <[email protected]>
---
 doc/guides/rel_notes/release_26_07.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/doc/guides/rel_notes/release_26_07.rst 
b/doc/guides/rel_notes/release_26_07.rst
index 4ca0a9ac77..4918cb59ed 100644
--- a/doc/guides/rel_notes/release_26_07.rst
+++ b/doc/guides/rel_notes/release_26_07.rst
@@ -241,6 +241,16 @@ API Changes
   - ``rte_pmd_mlx5_enable_steering``
   - ``rte_pmd_mlx5_disable_steering``
 
+* **ip_frag: changed handling of malformed fragments.**
+
+  - Duplicate fragments are tolerated instead of failing reassembly.
+  - Overlapping fragments are rejected on arrival rather than during 
reassembly.
+  - Oversized fragments (reassembled length over 65535) are rejected.
+  - For IPv6, fragments with per-fragment extension headers are rejected.
+
+  Overlap and oversize are now detected on arrival, which adds a scan of the
+  already received fragments per fragment and may affect throughput.
+
 
 ABI Changes
 -----------
-- 
2.53.0

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