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Reason for change:
An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.
Test Procedure:

  1. Capture packages on lan client
  2. Send query with edns from lan client
  3. Check the UDP payload size in the Additional records in DNS response package, which should be 1232 instead of 4096
    Risks: Low

Signed-off-by: Owen Lu owen_lu@sercomm.com

Reason for change:
An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.
Test Procedure:
1. Capture packages on lan client
2. Send query with edns from lan client
3. Check the UDP payload size in the Additional records in DNS response package, which should be 1232 instead of 4096
Risks: Low

Signed-off-by: Owen Lu <owen_lu@sercomm.com>
@owen-lu-sercomm owen-lu-sercomm requested review from a team as code owners January 27, 2026 10:28
@pradeeptakdas pradeeptakdas changed the title RDKBDEV-3351:Fix for EDNS package size incorrect, CVE-2023-28450 RDKCOM-5501: RDKBDEV-3351 Fix for EDNS package size incorrect, CVE-2023-28450 Jan 27, 2026
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