In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: cortina: Carry over frag counter
The gmac_rx() NAPI poll function assembles packets in an SKB from a ring buffer.
If the ring buffer gets completely emptied during a poll cycle, we exit gmac_rx(), but the packet is not yet completely assembled in the SKB, yet the fragment counter frag_nr is reset to zero on the next invocation.
Solve this by making the RX fragment counter a part of the port struct, and carry it over between invocations.
Reset the fragment counter only right after calling napi_gro_frags(), on error (after calling napi_free_frags()) or if stopping the port.
Reset it in some place where not strictly necessary just to emphasize what is going on.
This was found by Sashiko during normal patch review.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 20, 2026 | Jul 20, 2026 |
| Ubuntu | — | Upgrade linux-image-nvidiaUpgrade linux-image-genericUpgrade linux-image-generic-lpaeUpgrade linux-image-ibmUpgrade linux-image-lowlatencyUpgrade linux-image-aws-64k-5.15Upgrade linux-image-5.15.0-1117-azure-fdeUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-5.15.0-186-generic-lpaeUpgrade linux-image-intelUpgrade linux-image-5.15.0-1104-intel-iot-realtimeUpgrade linux-image-5.15.0-1112-aws-fipsUpgrade linux-image-aws-lts-22.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-nvidia-tegraUpgrade linux-image-oracleUpgrade linux-image-oem-20.04dUpgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-azure-fde-7.0Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-fips-5.15Upgrade linux-image-oracle-64k-7.0Upgrade linux-image-lowlatency-64kUpgrade linux-image-generic-5.15Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-oracle-7.0Upgrade linux-image-gkeopUpgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-5.15.0-1112-gcpUpgrade linux-image-oem-20.04bUpgrade linux-image-aws-64kUpgrade linux-image-virtualUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-5.15.0-1111-realtimeUpgrade linux-image-generic-64kUpgrade linux-image-gke-5.15Upgrade linux-image-azure-lts-22.04Upgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-7.0.0-1009-awsUpgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-kvm-5.15Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-5.15.0-186-generic-64kUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-5.15.0-1112-awsUpgrade linux-image-azure-fdeUpgrade linux-image-5.15.0-1104-kvmUpgrade linux-image-azure-fipsUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-fipsUpgrade linux-image-ibm-7.0Upgrade linux-image-5.15.0-1109-oracleUpgrade linux-image-5.15.0-1107-intel-iotgUpgrade linux-image-5.15.0-1112-gcp-fipsUpgrade linux-image-generic-64k-5.15Upgrade linux-image-aws-64k-7.0Upgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-generic-hwe-20.04Upgrade linux-image-azure-cvmUpgrade linux-image-azure-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-5.15.0-184-lowlatencyUpgrade linux-image-aws-5.15Upgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-realtime-5.15Upgrade linux-image-raspi-7.0Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-kvmUpgrade linux-image-azure-fips-5.15Upgrade linux-image-aws-fips-5.15Upgrade linux-image-aws-fipsUpgrade linux-image-awsUpgrade linux-image-lowlatency-5.15Upgrade linux-image-gkeUpgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-5.15.0-1053-nvidia-tegra-igx-rtUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-azure-5.15Upgrade linux-image-5.15.0-1106-ibmUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-intel-iotgUpgrade linux-image-gkeop-5.15Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-5.15.0-1095-gkeopUpgrade linux-image-oracle-5.15Upgrade linux-image-ibm-5.15Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-186-fipsUpgrade linux-image-5.15.0-1112-aws-64kUpgrade linux-image-5.15.0-1064-nvidia-tegra-rtUpgrade linux-image-5.15.0-1108-gkeUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-azure-fde-5.15Upgrade linux-image-nvidia-5.15Upgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-virtual-5.15Upgrade linux-image-oracle-64kUpgrade linux-image-oem-20.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-realtimeUpgrade linux-image-raspiUpgrade linux-image-oem-20.04cUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-gcp-5.15Upgrade linux-image-azureUpgrade linux-image-5.15.0-1107-nvidiaUpgrade linux-image-5.15.0-1075-xilinx-zynqmpUpgrade linux-image-gcp-fipsUpgrade linux-image-5.15.0-1117-azureUpgrade linux-image-5.15.0-186-genericUpgrade linux-image-5.15.0-184-lowlatency-64kUpgrade linux-image-5.15.0-1117-azure-fipsUpgrade linux-image-5.15.0-1107-nvidia-lowlatencyUpgrade linux-image-5.15.0-1064-nvidia-tegraUpgrade linux-image-5.15.0-1053-nvidia-tegra-igx | Jul 21, 2026 | Jul 21, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 27, 2026 | Jul 19, 2026 |
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