vxlan
by Linux
CVEs (2)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2026-23293 | 0.00 | — | 0.00 | Mar 25, 2026 | In the Linux kernel, the following vulnerability has been resolved: net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled When booting with the 'ipv6.disable=1' parameter, the nd_tbl is never initialized because inet6_init() exits before ndisc_init() is called which initializes it. If an IPv6 packet is injected into the interface, route_shortcircuit() is called and a NULL pointer dereference happens on neigh_lookup(). BUG: kernel NULL pointer dereference, address: 0000000000000380 Oops: Oops: 0000 [#1] SMP NOPTI [...] RIP: 0010:neigh_lookup+0x20/0x270 [...] Call Trace: vxlan_xmit+0x638/0x1ef0 [vxlan] dev_hard_start_xmit+0x9e/0x2e0 __dev_queue_xmit+0xbee/0x14e0 packet_sendmsg+0x116f/0x1930 __sys_sendto+0x1f5/0x200 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x12f/0x1590 entry_SYSCALL_64_after_hwframe+0x76/0x7e Fix this by adding an early check on route_shortcircuit() when protocol is ETH_P_IPV6. Note that ipv6_mod_enabled() cannot be used here because VXLAN can be built-in even when IPv6 is built as a module. | |||
| CVE-2023-53190 | 0.00 | — | 0.00 | Sep 15, 2025 | In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix memory leaks in error path The memory allocated by vxlan_vnigroup_init() is not freed in the error path, leading to memory leaks [1]. Fix by calling vxlan_vnigroup_uninit() in the error path. The leaks can be reproduced by annotating gro_cells_init() with ALLOW_ERROR_INJECTION() and then running: # echo "100" > /sys/kernel/debug/fail_function/probability # echo "1" > /sys/kernel/debug/fail_function/times # echo "gro_cells_init" > /sys/kernel/debug/fail_function/inject # printf %#x -12 > /sys/kernel/debug/fail_function/gro_cells_init/retval # ip link add name vxlan0 type vxlan dstport 4789 external vnifilter RTNETLINK answers: Cannot allocate memory [1] unreferenced object 0xffff88810db84a00 (size 512): comm "ip", pid 330, jiffies 4295010045 (age 66.016s) hex dump (first 32 bytes): f8 d5 76 0e 81 88 ff ff 01 00 00 00 00 00 00 02 ..v............. 03 00 04 00 48 00 00 00 00 00 00 01 04 00 01 00 ....H........... backtrace: [] kmalloc_trace+0x2a/0x60 [] vxlan_vnigroup_init+0x4c/0x160 [] vxlan_init+0x1ae/0x280 [] register_netdevice+0x57a/0x16d0 [] __vxlan_dev_create+0x7c7/0xa50 [] vxlan_newlink+0xd6/0x130 [] __rtnl_newlink+0x112b/0x18a0 [] rtnl_newlink+0x6c/0xa0 [] rtnetlink_rcv_msg+0x43f/0xd40 [] netlink_rcv_skb+0x170/0x440 [] netlink_unicast+0x53f/0x810 [] netlink_sendmsg+0x958/0xe70 [] ____sys_sendmsg+0x78f/0xa90 [] ___sys_sendmsg+0x13a/0x1e0 [] __sys_sendmsg+0x11c/0x1f0 [] do_syscall_64+0x38/0x80 unreferenced object 0xffff88810e76d5f8 (size 192): comm "ip", pid 330, jiffies 4295010045 (age 66.016s) hex dump (first 32 bytes): 04 00 00 00 00 00 00 00 db e1 4f e7 00 00 00 00 ..........O..... 08 d6 76 0e 81 88 ff ff 08 d6 76 0e 81 88 ff ff ..v.......v..... backtrace: [] __kmalloc_node+0x4e/0x90 [] kvmalloc_node+0xa6/0x1f0 [] bucket_table_alloc.isra.0+0x83/0x460 [] rhashtable_init+0x43b/0x7c0 [] vxlan_vnigroup_init+0x6c/0x160 [] vxlan_init+0x1ae/0x280 [] register_netdevice+0x57a/0x16d0 [] __vxlan_dev_create+0x7c7/0xa50 [] vxlan_newlink+0xd6/0x130 [] __rtnl_newlink+0x112b/0x18a0 [] rtnl_newlink+0x6c/0xa0 [] rtnetlink_rcv_msg+0x43f/0xd40 [] netlink_rcv_skb+0x170/0x440 [] netlink_unicast+0x53f/0x810 [] netlink_sendmsg+0x958/0xe70 [] ____sys_sendmsg+0x78f/0xa90 |
- CVE-2026-23293Mar 25, 2026risk 0.00cvss —epss 0.00
In the Linux kernel, the following vulnerability has been resolved: net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled When booting with the 'ipv6.disable=1' parameter, the nd_tbl is never initialized because inet6_init() exits before ndisc_init() is called which initializes it. If an IPv6 packet is injected into the interface, route_shortcircuit() is called and a NULL pointer dereference happens on neigh_lookup(). BUG: kernel NULL pointer dereference, address: 0000000000000380 Oops: Oops: 0000 [#1] SMP NOPTI [...] RIP: 0010:neigh_lookup+0x20/0x270 [...] Call Trace: vxlan_xmit+0x638/0x1ef0 [vxlan] dev_hard_start_xmit+0x9e/0x2e0 __dev_queue_xmit+0xbee/0x14e0 packet_sendmsg+0x116f/0x1930 __sys_sendto+0x1f5/0x200 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x12f/0x1590 entry_SYSCALL_64_after_hwframe+0x76/0x7e Fix this by adding an early check on route_shortcircuit() when protocol is ETH_P_IPV6. Note that ipv6_mod_enabled() cannot be used here because VXLAN can be built-in even when IPv6 is built as a module.
- CVE-2023-53190Sep 15, 2025risk 0.00cvss —epss 0.00
In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix memory leaks in error path The memory allocated by vxlan_vnigroup_init() is not freed in the error path, leading to memory leaks [1]. Fix by calling vxlan_vnigroup_uninit() in the error path. The leaks can be reproduced by annotating gro_cells_init() with ALLOW_ERROR_INJECTION() and then running: # echo "100" > /sys/kernel/debug/fail_function/probability # echo "1" > /sys/kernel/debug/fail_function/times # echo "gro_cells_init" > /sys/kernel/debug/fail_function/inject # printf %#x -12 > /sys/kernel/debug/fail_function/gro_cells_init/retval # ip link add name vxlan0 type vxlan dstport 4789 external vnifilter RTNETLINK answers: Cannot allocate memory [1] unreferenced object 0xffff88810db84a00 (size 512): comm "ip", pid 330, jiffies 4295010045 (age 66.016s) hex dump (first 32 bytes): f8 d5 76 0e 81 88 ff ff 01 00 00 00 00 00 00 02 ..v............. 03 00 04 00 48 00 00 00 00 00 00 01 04 00 01 00 ....H........... backtrace: [] kmalloc_trace+0x2a/0x60 [] vxlan_vnigroup_init+0x4c/0x160 [] vxlan_init+0x1ae/0x280 [] register_netdevice+0x57a/0x16d0 [] __vxlan_dev_create+0x7c7/0xa50 [] vxlan_newlink+0xd6/0x130 [] __rtnl_newlink+0x112b/0x18a0 [] rtnl_newlink+0x6c/0xa0 [] rtnetlink_rcv_msg+0x43f/0xd40 [] netlink_rcv_skb+0x170/0x440 [] netlink_unicast+0x53f/0x810 [] netlink_sendmsg+0x958/0xe70 [] ____sys_sendmsg+0x78f/0xa90 [] ___sys_sendmsg+0x13a/0x1e0 [] __sys_sendmsg+0x11c/0x1f0 [] do_syscall_64+0x38/0x80 unreferenced object 0xffff88810e76d5f8 (size 192): comm "ip", pid 330, jiffies 4295010045 (age 66.016s) hex dump (first 32 bytes): 04 00 00 00 00 00 00 00 db e1 4f e7 00 00 00 00 ..........O..... 08 d6 76 0e 81 88 ff ff 08 d6 76 0e 81 88 ff ff ..v.......v..... backtrace: [] __kmalloc_node+0x4e/0x90 [] kvmalloc_node+0xa6/0x1f0 [] bucket_table_alloc.isra.0+0x83/0x460 [] rhashtable_init+0x43b/0x7c0 [] vxlan_vnigroup_init+0x6c/0x160 [] vxlan_init+0x1ae/0x280 [] register_netdevice+0x57a/0x16d0 [] __vxlan_dev_create+0x7c7/0xa50 [] vxlan_newlink+0xd6/0x130 [] __rtnl_newlink+0x112b/0x18a0 [] rtnl_newlink+0x6c/0xa0 [] rtnetlink_rcv_msg+0x43f/0xd40 [] netlink_rcv_skb+0x170/0x440 [] netlink_unicast+0x53f/0x810 [] netlink_sendmsg+0x958/0xe70 [] ____sys_sendmsg+0x78f/0xa90