In the Linux kernel, the following vulnerability has been resolved:
virtio-net: fix received length check in big packets
Since commit 4959aebba8c0 ("virtio-net: use mtu size as buffer length for big packets"), when guest gso is off, the allocated size for big packets is not MAX_SKB_FRAGS * PAGE_SIZE anymore but depends on negotiated MTU. The number of allocated frags for big packets is stored in vi->big_packets_num_skbfrags.
Because the host announced buffer length can be malicious (e.g. the host vhost_net driver's get_rx_bufs is modified to announce incorrect length), we need a check in virtio_net receive path. Currently, the check is not adapted to the new change which can lead to NULL page pointer dereference in the below while loop when receiving length that is larger than the allocated one.
This commit fixes the received length check corresponding to the new change.
CVSS Details
- CVSS 3.1 Base Score: 8.4
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-develUpgrade kernel6.12-libbpf-debuginfoUpgrade kernel-livepatch-6.12.58-82.121Upgrade kernel-modules-extraUpgrade kernel6.12-toolsUpgrade kernel6.12-libbpf-staticUpgrade kernel-tools-debuginfoUpgrade perfUpgrade python3-perf6.12Upgrade kernel6.12-tools-develUpgrade bpftool6.12-debuginfoUpgrade python3-perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade perf6.12-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade kernel6.12-libbpfUpgrade kernel-develUpgrade kernel-libbpf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-libbpfUpgrade bpftoolUpgrade kernel6.12-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade python3-perfUpgrade kernel-livepatch-6.1.159-181.297Upgrade kernel-modules-extra-commonUpgrade kernel-libbpf-develUpgrade kernel6.12-modules-extra-commonUpgrade perf6.12Upgrade kernel-debuginfo-common-x86_64Upgrade bpftool6.12Upgrade kernelUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-headersUpgrade kernel-toolsUpgrade kernel6.12-modules-extraUpgrade kernel6.12-libbpf-develUpgrade kernel-libbpf-staticUpgrade bpftool-debuginfoUpgrade kernel6.12Upgrade kernel-headersUpgrade kernel6.12-debuginfo | Jan 12, 2026 | Dec 8, 2025 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Jan 12, 2026 | Jan 12, 2026 |
| Oracle_linux | — | Upgrade kernel-uek | Jan 15, 2026 | Dec 8, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 8, 2025 |
| Ubuntu | — | Upgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1048-gkeUpgrade linux-image-6.8.0-1049-nvidia-64kUpgrade linux-image-6.17.0-1008-raspiUpgrade linux-image-fips-6.8Upgrade linux-image-aws-64kUpgrade linux-image-fipsUpgrade linux-image-virtualUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-aws-fips-6.8Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.17.0-1007-oracleUpgrade linux-image-generic-6.8Upgrade linux-image-intel-iotgUpgrade linux-image-6.8.0-1050-awsUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-6.8.0-1052-gcpUpgrade linux-image-6.8.0-1050-raspiUpgrade linux-image-6.8.0-1052-gcp-fipsUpgrade linux-image-6.17.0-1006-realtimeUpgrade linux-image-6.17.0-14-generic-64kUpgrade linux-image-aws-64k-6.8Upgrade linux-image-aws-6.17Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-xilinxUpgrade linux-image-generic-6.17Upgrade linux-image-oracle-6.17Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-6.8.0-1047-oracleUpgrade linux-image-kvmUpgrade linux-image-raspi-6.17Upgrade linux-image-oracleUpgrade linux-image-raspi-realtimeUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gcp-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-6.17.0-1011-oemUpgrade linux-image-gkeop-6.8Upgrade linux-image-realtimeUpgrade linux-image-awsUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-1049-nvidiaUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-gcpUpgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-106-generic-64kUpgrade linux-image-ibm-6.8Upgrade linux-image-6.8.0-1049-nvidia-lowlatencyUpgrade linux-image-6.8.0-1050-aws-fipsUpgrade linux-image-oem-6.17Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-gcp-6.17Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-gkeUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1035-gkeopUpgrade linux-image-generic-lpaeUpgrade linux-image-6.17.0-1007-gcp-64kUpgrade linux-image-6.8.1-1045-realtimeUpgrade linux-image-azure-fips-6.8Upgrade linux-image-nvidiaUpgrade linux-image-6.17.0-1007-aws-64kUpgrade linux-image-genericUpgrade linux-image-raspiUpgrade linux-image-azure-lts-24.04Upgrade linux-image-xilinx-6.8Upgrade linux-image-6.8.0-1049-ibmUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-generic-64k-6.17Upgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-1052-gcp-64kUpgrade linux-image-6.8.0-1052-azure-fipsUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-gcp-fipsUpgrade linux-image-6.8.0-1051-azureUpgrade linux-image-gke-64kUpgrade linux-image-azure-6.17Upgrade linux-image-6.8.0-106-genericUpgrade linux-image-nvidia-6.8Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-6.17.0-1008-azureUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-6.8.0-1048-gke-64kUpgrade linux-image-lowlatencyUpgrade linux-image-aws-64k-6.17Upgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1050-aws-64kUpgrade linux-image-realtime-6.17Upgrade linux-image-6.8.0-2040-raspi-realtimeUpgrade linux-image-6.8.0-106-lowlatency-64kUpgrade linux-image-6.17.0-1007-awsUpgrade linux-image-ibm-classicUpgrade linux-image-realtime-6.8.1Upgrade linux-image-gcp-64kUpgrade linux-image-6.17.0-1007-oracle-64kUpgrade linux-image-azureUpgrade linux-image-azure-fipsUpgrade linux-image-6.8.0-1049-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04cUpgrade linux-image-virtual-6.8Upgrade linux-image-gkeopUpgrade linux-image-6.8.0-106-lowlatencyUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.17.0-1007-gcpUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1029-xilinxUpgrade linux-image-raspi-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-generic-64k-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-gcp-64k-6.17Upgrade linux-image-aws-lts-24.04Upgrade linux-image-oracle-6.8Upgrade linux-image-oem-22.04aUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.17.0-14-genericUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.8.0-106-fipsUpgrade linux-image-gke-6.8Upgrade linux-image-generic-64kUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-6.8.0-1047-oracle-64kUpgrade linux-image-virtual-6.17Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-oracle-64k-6.17Upgrade linux-image-lowlatency-6.8Upgrade linux-image-ibmUpgrade linux-image-gke-64k-6.8Upgrade linux-image-aws-6.8 | Feb 13, 2026 | Feb 12, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Feb 9, 2026 | Dec 8, 2025 |
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