In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe
get_srq_wqe() reads wqe->dma.num_sge from the shared receive queue buffer, which is mapped into userspace. It validates num_sge against max_sge, but then re-reads the same field to calculate the memcpy size. A concurrent userspace thread can modify num_sge between validation and use, causing a heap buffer overflow when copying the WQE into qp->resp.srq_wqe.
Read num_sge into a local variable and use it for both the bounds check and the size calculation.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Aug 16, 2026 | Aug 16, 2026 |
| Redhat_linux | — | No solution exists | Aug 24, 2026 | Aug 15, 2026 |
| Ubuntu | — | Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-gke-64k-7.0Upgrade linux-image-lowlatency-6.8Upgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-realtime-7.0Upgrade linux-image-fipsUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-tegraUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-6.8.0-147-genericUpgrade linux-image-aws-fipsUpgrade linux-image-azure-fde-6.8Upgrade linux-image-realtime-6.8.1Upgrade linux-image-aws-6.8Upgrade linux-image-gcp-6.8Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-6.8.0-147-fipsUpgrade linux-image-gcp-fipsUpgrade linux-image-7.0.0-1013-oracle-64kUpgrade linux-image-aws-64k-7.0Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-7.0.0-1013-oracleUpgrade linux-image-azure-fde-7.0Upgrade linux-image-gke-7.0Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-6.8.0-1071-gcp-fipsUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-oracleUpgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1071-gcpUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-6.8.0-147-generic-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-realtimeUpgrade linux-image-6.8.0-1066-gkeUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-147-lowlatencyUpgrade linux-image-aws-7.0Upgrade linux-image-gkeopUpgrade linux-image-6.8.0-1069-azure-fdeUpgrade linux-image-oem-26.04aUpgrade linux-image-oem-26.04Upgrade linux-image-gcp-64kUpgrade linux-image-lowlatencyUpgrade linux-image-azure-fdeUpgrade linux-image-gke-64kUpgrade linux-image-azureUpgrade linux-image-ibm-7.0Upgrade linux-image-6.8.0-1067-ibmUpgrade linux-image-virtual-6.8Upgrade linux-image-7.0.0-38-realtime-64kUpgrade linux-image-6.8.0-147-lowlatency-64kUpgrade linux-image-gcp-7.0Upgrade linux-image-azure-lts-26.04Upgrade linux-image-genericUpgrade linux-image-lowlatency-64kUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-7.0.0-1016-azure-fdeUpgrade linux-image-7.0.0-38-realtimeUpgrade linux-image-generic-64k-7.0Upgrade linux-image-azure-lts-24.04Upgrade linux-image-oem-7.0Upgrade linux-image-gcpUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-6.8.0-1071-gcp-64kUpgrade linux-image-7.0.0-1014-gcpUpgrade linux-image-azure-7.0Upgrade linux-image-7.0.0-1014-awsUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-realtime-64k-7.0Upgrade linux-image-oracle-7.0Upgrade linux-image-virtual-hwe-26.04Upgrade linux-image-awsUpgrade linux-image-6.8.0-1067-awsUpgrade linux-image-6.8.0-1064-oracleUpgrade linux-image-aws-64k-6.8Upgrade linux-image-6.8.0-1064-oracle-64kUpgrade linux-image-aws-fips-6.8Upgrade linux-image-generic-7.0Upgrade linux-image-6.8.1-1062-realtimeUpgrade linux-image-6.8.0-1052-gkeopUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1036-nvidia-tegra-rtUpgrade linux-image-oracle-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-ibm-6.8Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-6.8.0-1066-gke-64kUpgrade linux-image-6.8.0-1067-aws-fipsUpgrade linux-image-7.0.0-1015-ibmUpgrade linux-image-6.8.0-1071-azureUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-7.0.0-1008-gkeUpgrade linux-image-6.8.0-1036-nvidia-tegraUpgrade linux-image-generic-64k-6.8Upgrade linux-image-intel-iotgUpgrade linux-image-azure-fde-lts-26.04Upgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-1071-azure-fipsUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-7.0.0-1017-azureUpgrade linux-image-7.0.0-1015-oemUpgrade linux-image-7.0.0-1014-aws-64kUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-gke-6.8Upgrade linux-image-7.0.0-38-genericUpgrade linux-image-kvmUpgrade linux-image-gkeop-6.8Upgrade linux-image-realtime-64kUpgrade linux-image-gkeUpgrade linux-image-aws-64kUpgrade linux-image-7.0.0-38-generic-64kUpgrade linux-image-7.0.0-1014-gcp-64kUpgrade linux-image-aws-lts-24.04Upgrade linux-image-generic-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-7.0.0-1008-gke-64kUpgrade linux-image-gke-64k-6.8Upgrade linux-image-virtualUpgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-oracle-64kUpgrade linux-image-generic-hwe-26.04Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-fips-6.8Upgrade linux-image-laptop-23.10Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-ibmUpgrade linux-image-azure-fipsUpgrade linux-image-virtual-7.0Upgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1067-aws-64k | Oct 7, 2026 | Oct 6, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 21, 2026 | Aug 15, 2026 |
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