In the Linux kernel, the following vulnerability has been resolved:
net: bonding: 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 bonding ARP/NS validation is enabled, an IPv6 NS/NA packet received on a slave can reach bond_validate_na(), which calls bond_has_this_ip6(). That path calls ipv6_chk_addr() and can crash in __ipv6_chk_addr_and_flags().
BUG: kernel NULL pointer dereference, address: 00000000000005d8 Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:__ipv6_chk_addr_and_flags+0x69/0x170 Call Trace: <IRQ> ipv6_chk_addr+0x1f/0x30 bond_validate_na+0x12e/0x1d0 [bonding] ? __pfx_bond_handle_frame+0x10/0x10 [bonding] bond_rcv_validate+0x1a0/0x450 [bonding] bond_handle_frame+0x5e/0x290 [bonding] ? srso_alias_return_thunk+0x5/0xfbef5 __netif_receive_skb_core.constprop.0+0x3e8/0xe50 ? srso_alias_return_thunk+0x5/0xfbef5 ? update_cfs_rq_load_avg+0x1a/0x240 ? srso_alias_return_thunk+0x5/0xfbef5 ? __enqueue_entity+0x5e/0x240 __netif_receive_skb_one_core+0x39/0xa0 process_backlog+0x9c/0x150 __napi_poll+0x30/0x200 ? srso_alias_return_thunk+0x5/0xfbef5 net_rx_action+0x338/0x3b0 handle_softirqs+0xc9/0x2a0 do_softirq+0x42/0x60 </IRQ> <TASK> __local_bh_enable_ip+0x62/0x70 __dev_queue_xmit+0x2d3/0x1000 ? srso_alias_return_thunk+0x5/0xfbef5 ? srso_alias_return_thunk+0x5/0xfbef5 ? packet_parse_headers+0x10a/0x1a0 packet_sendmsg+0x10da/0x1700 ? kick_pool+0x5f/0x140 ? srso_alias_return_thunk+0x5/0xfbef5 ? __queue_work+0x12d/0x4f0 __sys_sendto+0x1f3/0x220 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x101/0xf80 ? exc_page_fault+0x6e/0x170 ? srso_alias_return_thunk+0x5/0xfbef5 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK>
Fix this by checking ipv6_mod_enabled() before dispatching IPv6 packets to bond_na_rcv(). If IPv6 is disabled, return early from bond_rcv_validate() and avoid the path to ipv6_chk_addr().
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | May 10, 2026 | May 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | May 8, 2026 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1061-raspiUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1059-nvidia-64kUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-oem-22.04Upgrade linux-image-oem-20.04bUpgrade linux-image-aws-fipsUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidiaUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-6.8.0-1033-xilinxUpgrade linux-image-gkeUpgrade linux-image-6.8.0-1064-gcp-fipsUpgrade linux-image-6.8.0-136-lowlatencyUpgrade linux-image-6.8.0-1059-nvidia-lowlatencyUpgrade linux-image-azure-lts-24.04Upgrade linux-image-generic-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-ibmUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.8.0-1059-gkeUpgrade linux-image-6.8.0-1058-oracle-64kUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-fipsUpgrade linux-image-6.8.1-1056-realtimeUpgrade linux-image-lowlatency-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-nvidia-tegraUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.0-1064-gcp-64kUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-genericUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-1058-oracleUpgrade linux-image-6.8.0-136-fipsUpgrade linux-image-gkeopUpgrade linux-image-intel-iotgUpgrade linux-image-lowlatencyUpgrade linux-image-virtualUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-6.8.0-1046-gkeopUpgrade linux-image-6.8.0-1061-awsUpgrade linux-image-oracleUpgrade linux-image-aws-lts-24.04Upgrade linux-image-aws-6.8Upgrade linux-image-oracle-64kUpgrade linux-image-oem-22.04bUpgrade linux-image-gcp-64kUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-oem-20.04Upgrade linux-image-xilinxUpgrade linux-image-raspiUpgrade linux-image-nvidia-64kUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gke-64k-6.8Upgrade linux-image-fips-6.8Upgrade linux-image-azure-fde-6.8Upgrade linux-image-azure-fdeUpgrade linux-image-aws-64k-6.8Upgrade linux-image-awsUpgrade linux-image-6.8.0-2050-raspi-realtimeUpgrade linux-image-6.8.0-1061-aws-fipsUpgrade linux-image-oem-20.04cUpgrade linux-image-azure-fipsUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-generic-64k-6.8Upgrade linux-image-generic-6.8Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-6.8.0-1059-nvidiaUpgrade linux-image-gcp-6.8Upgrade linux-image-6.8.0-1059-nvidia-lowlatency-64kUpgrade linux-image-laptop-23.10Upgrade linux-image-kvmUpgrade linux-image-gcp-fipsUpgrade linux-image-oracle-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-aws-fips-6.8Upgrade linux-image-6.8.0-1059-gke-64kUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-gke-64kUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-xilinx-6.8Upgrade linux-image-6.8.0-1064-gcpUpgrade linux-image-6.8.0-1030-nvidia-tegraUpgrade linux-image-raspi-6.8Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-aws-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-azureUpgrade linux-image-6.8.0-1063-azure-fipsUpgrade linux-image-raspi-realtimeUpgrade linux-image-gke-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-6.8.0-1061-ibmUpgrade linux-image-virtual-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-136-lowlatency-64kUpgrade linux-image-6.8.0-1061-aws-64kUpgrade linux-image-realtimeUpgrade linux-image-6.8.0-1063-azureUpgrade linux-image-gcpUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-oem-20.04dUpgrade linux-image-oem-22.04cUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-6.8.0-136-genericUpgrade linux-image-6.8.0-1030-nvidia-tegra-rtUpgrade linux-image-realtime-6.8.1 | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 6, 2026 | May 8, 2026 |
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