Vulnerability · Published Aug 15, 2026 · Assigned by Linux
CVE-2026-74406vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().
Critical 9.8
In plain English
A critical-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.5%top 56.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive(). udp_tunnel_sock_release() could set sk->sk_user_data to NULL while vxlan_gro_prepare_receive() is running. Let's check if rcu_dereference_sk_user_data() is NULL after skb_gro_remcsum_init().
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 6.1.180-1 | DEBIAN-CVE-2026-74406 |
| Debian:13 | linux | 6.12.100-1 | DEBIAN-CVE-2026-74406 |
| Debian:14 | linux | 7.1.5-1 | DEBIAN-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux | 6.8.0-147.147 | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux | 7.0.0-34.34 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-aws | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1067.70 | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-aws | 7.0.0-1013.13 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-aws-6.14 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-aws-6.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-aws-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-aws-7.0 | 7.0.0-1013.13~24.04.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-azure | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1071.79 | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-azure | 7.0.0-1017.17 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-6.14 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-6.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-azure-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-7.0 | 7.0.0-1017.17~24.04.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-azure-fde | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-fde | 6.8.0-1069.76 | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-azure-fde | 7.0.0-1016.16 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-fde-6.14 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-fde-6.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-fde-7.0 | 7.0.0-1016.16~24.04.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-azure-nvidia-6.14 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-gcp | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1071.79 | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-gcp | 7.0.0-1013.13 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-gcp-6.14 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-gcp-6.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-gcp-7.0 | 7.0.0-1013.13~24.04.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-gke | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1066.74 | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-gke | 7.0.0-1007.8 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-gkeop | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1052.56 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-hwe-6.14 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-hwe-6.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-hwe-7.0 | 7.0.0-34.34~24.04.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-ibm | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1067.68 | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-ibm | 7.0.0-1014.14 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-intel-iotg | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-kvm | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-lowlatency | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-147.147.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-nvidia | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-nvidia | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-nvidia | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-nvidia-6.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-nvidia-7.0 | 7.0.0-1024.25~24.04.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-nvidia-bos | 7.0.0-2022.23 | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 6.8.0-1035.38 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-oem-6.14 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-oem-6.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-oem-7.0 | 7.0.0-1014.14 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-oracle | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1064.67 | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-oracle | 7.0.0-1012.12 | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-oracle-6.14 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-oracle-6.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-oracle-7.0 | 7.0.0-1012.12~24.04.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-raspi | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-raspi | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-raspi | 7.0.0-1020.20 | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-realtime | 7.0.0-34.34.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:26.04:LTS | linux-riscv | 7.0.0-34.34.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-riscv-6.14 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-riscv-6.17 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-riscv-7.0 | 7.0.0-34.34.1~24.04.1 | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-vmware | 6.8.0-1008.8 | UBUNTU-CVE-2026-74406 |
| Ubuntu:24.04:LTS | linux-xilinx | no fix listed | UBUNTU-CVE-2026-74406 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | no fix listed | UBUNTU-CVE-2026-74406 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 5602c48cf87562c2f95b831d690631935e834295 – before 022af89207fcc992ec5c712c14e2e018c335eb1e5602c48cf87562c2f95b831d690631935e834295 – before a3104cc1fed994519538301efcaab175f9af60085602c48cf87562c2f95b831d690631935e834295 – before 9c58c729d32e7cea5772cc44929c6cd61e5a31cd5602c48cf87562c2f95b831d690631935e834295 – before f79c80f173fda9545b220c1f094b65fc06c252d05602c48cf87562c2f95b831d690631935e834295 – before 08f40c0d23c67c3aa4224c3311e134999c721fb45602c48cf87562c2f95b831d690631935e834295 – before 4a8cde6f7281ea2c4c290f9ad9923b3631defceb5602c48cf87562c2f95b831d690631935e834295 – before ef44dac2a37f86eeae6b88ed10a6d60b35387dfd5602c48cf87562c2f95b831d690631935e834295 – before 30a45c0bffdd62350261e2f2689fdba426a33578 |
| Linux | Linux | 4.7 |
References
- https://git.kernel.org/stable/c/022af89207fcc992ec5c712c14e2e018c335eb1e
- https://git.kernel.org/stable/c/a3104cc1fed994519538301efcaab175f9af6008
- https://git.kernel.org/stable/c/9c58c729d32e7cea5772cc44929c6cd61e5a31cd
- https://git.kernel.org/stable/c/f79c80f173fda9545b220c1f094b65fc06c252d0
- https://git.kernel.org/stable/c/08f40c0d23c67c3aa4224c3311e134999c721fb4
- https://git.kernel.org/stable/c/4a8cde6f7281ea2c4c290f9ad9923b3631defceb
- https://git.kernel.org/stable/c/ef44dac2a37f86eeae6b88ed10a6d60b35387dfd
- https://git.kernel.org/stable/c/30a45c0bffdd62350261e2f2689fdba426a33578