Version

7.2.0

Host OS Type

Windows

Host OS name + version

Windows 11 24H2 26100.4946

Host Architecture

x86

Guest OS Type

Linux

Guest Architecture

ARM

Guest OS name + version

Centos release 7.9.2009

Component

3D Support

What happened?

After upgrading VirtualBox from version 7.1.12-169691 to 7.2.0-170228, the NAT network of the virtual machine becomes inaccessible. However, if I downgrade back to version 7.1.12, it works normally again.

How can we reproduce this?

Host: win11
Guest: centos 7

Just upgrade or downgrade the host version from 7.1.12-169691 to 7.2.0-170228 .

Host global network Settings:
NAT network 192.68.139.0/24; DHCP disable.

At version 7.1.12, guest can access network:
[root@localhost ~]# cat /etc/sysconfig/network-scripts/
ifcfg-ens33 ifdown-Team ifup-post
ifcfg-lo ifdown-TeamPort ifup-ppp
ifdown ifdown-tunnel ifup-routes
ifdown-bnep ifup ifup-sit
ifdown-eth ifup-aliases ifup-Team
ifdown-ib ifup-bnep ifup-TeamPort
ifdown-ippp ifup-eth ifup-tunnel
ifdown-ipv6 ifup-ib ifup-wireless
ifdown-isdn ifup-ippp init.ipv6-global
ifdown-post ifup-ipv6 network-functions
ifdown-ppp ifup-isdn network-functions-ipv6
ifdown-routes ifup-plip
ifdown-sit ifup-plusb
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
HWADDR=08:00:27:F7:C6:0C
DEVICE=ens33
ONBOOT=YES
IPADDR=192.68.139.4
GATEWAY=192.68.139.1
NETMASK=255.255.255.0
DNS1=8.8.8.8

[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)
[root@localhost ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.68.139.4 netmask 255.255.255.0 broadcast 192.68.139.255
inet6 fe80::a00:27ff:fef7:c60c prefixlen 64 scopeid 0x20
ether 08:00:27:f7:c6:0c txqueuelen 1000 (Ethernet)
RX packets 243 bytes 28390 (27.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 200 bytes 32508 (31.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
RX packets 8 bytes 400 (400.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 8 bytes 400 (400.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

[root@localhost ~]# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=110 time=34.2 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=110 time=34.0 ms

But if upgrade host version to 7.2.0-170228, and keep all of the config unchanged.
At guest network become inaccessible.

If downgrade to 7.1 again, network become accessible.

Did you upload all of your necessary log files, screenshots, etc.?

• Yes, I've uploaded all pertinent files to this issue.