Windows Version

Microsoft Windows [Version 10.0.26100.6584]

WSL Version

2.6.0.0

Are you using WSL 1 or WSL 2?

• WSL 2
• WSL 1

Kernel Version

6.6.87.2-1

Distro Version

Ubuntu 22.04

Other Software

No response

Repro Steps

1. Configure Windows interface with IPs: 192.168.9.147/24 and 192.168.101.147/24
2. Add Windows route: 192.168.102.0/24 via 192.168.101.238
3. In WSL2: ping 192.168.101.238
4. Observe: Source address is incorrectly 192.168.9.147 instead of 192.168.101.147

Expected Behavior

WSL2 should select source address from the same subnet as the next-hop.

Actual Behavior

WSL2 creates route without source hint:
192.168.101.238 dev eth3 scope link
Should be:
192.168.101.238 dev eth3 src 192.168.101.147 scope link

Diagnostic Logs

No response