In the Linux kernel, the following vulnerability has been resolved:
net: stmmac: Correctly handle Rx checksum offload errors
The stmmac_rx function would previously set skb->ip_summed to CHECKSUM_UNNECESSARY if hardware checksum offload (CoE) was enabled and the packet was of a known IP ethertype.
However, this logic failed to check if the hardware had actually reported a checksum error. The hardware status, indicating a header or payload checksum failure, was being ignored at this stage. This could cause corrupt packets to be passed up the network stack as valid.
This patch corrects the logic by checking the `csum_none` status flag, which is set when the hardware reports a checksum error. If this flag is set, skb->ip_summed is now correctly set to CHECKSUM_NONE, ensuring the kernel's network stack will perform its own validation and properly handle the corrupt packet.
CVSS Details
- CVSS 3.1 Base Score: 8.2
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Ubuntu | — | Upgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1035-gkeopUpgrade linux-image-azureUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-azure-lts-24.04Upgrade linux-image-nvidiaUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-oem-22.04aUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-6.8.0-1052-gcp-64kUpgrade linux-image-ibmUpgrade linux-image-aws-6.8Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-gcp-fipsUpgrade linux-image-6.8.0-1051-azureUpgrade linux-image-xilinxUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1050-awsUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-6.17.0-1006-realtimeUpgrade linux-image-aws-64k-6.8Upgrade linux-image-6.8.0-1047-oracle-64kUpgrade linux-image-azure-fipsUpgrade linux-image-6.8.0-2040-raspi-realtimeUpgrade linux-image-gkeop-6.8Upgrade linux-image-virtual-6.8Upgrade linux-image-raspi-realtimeUpgrade linux-image-azure-fips-6.8Upgrade linux-image-gcpUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-virtual-6.17Upgrade linux-image-generic-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-1052-azure-fipsUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-6.8.0-1048-gkeUpgrade linux-image-azure-6.17Upgrade linux-image-6.17.0-14-generic-64kUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.17.0-1007-oracleUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-6.17.0-1007-aws-64kUpgrade linux-image-raspi-6.17Upgrade linux-image-raspiUpgrade linux-image-6.8.0-1048-gke-64kUpgrade linux-image-generic-6.17Upgrade linux-image-generic-64k-6.8Upgrade linux-image-6.8.0-1049-ibmUpgrade linux-image-6.8.0-106-genericUpgrade linux-image-6.8.1-1045-realtimeUpgrade linux-image-6.17.0-1007-gcpUpgrade linux-image-fipsUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-gke-64kUpgrade linux-image-generic-64kUpgrade linux-image-6.17.0-1011-oemUpgrade linux-image-fips-6.8Upgrade linux-image-6.17.0-1008-azureUpgrade linux-image-genericUpgrade linux-image-gkeopUpgrade linux-image-lowlatencyUpgrade linux-image-generic-lpaeUpgrade linux-image-ibm-classicUpgrade linux-image-oem-22.04cUpgrade linux-image-oem-22.04dUpgrade linux-image-6.8.0-1049-nvidia-64kUpgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1050-raspiUpgrade linux-image-6.8.0-1029-xilinxUpgrade linux-image-aws-lts-24.04Upgrade linux-image-aws-6.17Upgrade linux-image-awsUpgrade linux-image-6.8.0-1049-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1049-nvidiaUpgrade linux-image-6.17.0-1007-gcp-64kUpgrade linux-image-6.8.0-1047-oracleUpgrade linux-image-realtime-6.17Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.17.0-1008-raspiUpgrade linux-image-xilinx-6.8Upgrade linux-image-aws-fips-6.8Upgrade linux-image-aws-fipsUpgrade linux-image-6.17.0-14-genericUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-kvmUpgrade linux-image-raspi-6.8Upgrade linux-image-oem-6.17Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gcp-64k-6.17Upgrade linux-image-oracle-64k-6.17Upgrade linux-image-gcp-64kUpgrade linux-image-gkeUpgrade linux-image-6.8.0-106-generic-64kUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-virtualUpgrade linux-image-generic-64k-6.17Upgrade linux-image-azure-6.8Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.8.0-106-fipsUpgrade linux-image-6.8.0-1052-gcpUpgrade linux-image-6.17.0-1007-oracle-64kUpgrade linux-image-6.17.0-1007-awsUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-oracle-64kUpgrade linux-image-oracle-6.8Upgrade linux-image-oracle-6.17Upgrade linux-image-6.8.0-1050-aws-fipsUpgrade linux-image-6.8.0-1050-aws-64kUpgrade linux-image-nvidia-6.8Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-lowlatency-6.8Upgrade linux-image-gcp-6.8Upgrade linux-image-gcp-6.17Upgrade linux-image-6.8.0-1049-nvidia-lowlatencyUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-gke-64k-6.8Upgrade linux-image-realtimeUpgrade linux-image-realtime-6.8.1Upgrade linux-image-oracleUpgrade linux-image-intel-iotgUpgrade linux-image-6.8.0-106-lowlatency-64kUpgrade linux-image-6.8.0-106-lowlatencyUpgrade linux-image-6.8.0-1052-gcp-fipsUpgrade linux-image-aws-64k-6.17Upgrade linux-image-aws-64kUpgrade linux-image-generic-hwe-22.04 | Feb 13, 2026 | Feb 12, 2026 |
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