Update CHANGELOG for v2.4.2 release

Signed-off-by: Lan Luo <[email protected]>

Author: luolanzone

CHANGELOG/CHANGELOG-2.4.md

@@ -1,5 +1,16 @@
 # Changelog 2.4
 
+## 2.4.2 - 2025-09-15
+
+### Fixed
+
+- Fix agent crash issue which is caused by unexpected interface store initialization for FlexibleIPAM uplink internal port. ([#7389](https://github.com/antrea-io/antrea/pull/7389), [@gran-vmv])
+- Ignore conntrack connections denied by policy for FlowExporter. ([#7361](https://github.com/antrea-io/antrea/pull/7361), [@antoninbas])
+- Add missing policy UIDs for denied connections for FlowExporter. ([#7388](https://github.com/antrea-io/antrea/pull/7388), [@antoninbas])
+- Fix ACNP applied to NodePort failing to reject traffic in noEncap/hybrid mode. ([#7265](https://github.com/antrea-io/antrea/pull/7265), [@hongliangl])
+- Use a more robust way to extract the source Node IP from encapsulated IGMP messages for Multicast. ([#7282](https://github.com/antrea-io/antrea/pull/7282), [@hongliangl])
+- Upgrade CNI plugins to v1.8.0 to fix CVEs. ([#7397](https://github.com/antrea-io/antrea/pull/7397), [@luolanzone])
+
 ## 2.4.1 - 2025-08-13
 
 ### Added
@@ -83,6 +94,7 @@
 [@XinShuYang]: https://github.com/XinShuYang
 [@antoninbas]: https://github.com/antoninbas
 [@g4rud4kun]: https://github.com/g4rud4kun
+[@gran-vmv]: https://github.com/gran-vmv
 [@hangyan]: https://github.com/hangyan
 [@hongliangl]: https://github.com/hongliangl
 [@jianjuns]: https://github.com/jianjuns