In the Linux kernel, the following vulnerability has been resolved:
RDMA/irdma: Fix OOB read during CQ MR registration
Sashiko pointed out an unrelated bug during a previous patch: https://sashiko.dev/#/patchset/20260512183852.614045-1-jmoroni%40google.com
This change fixes the bug by eliminating the cqmr->split field which was not being set properly and instead just checks the CQ resize feature flag directly.
The cqmr->split field essentially tracks whether IRDMA_FEATURE_CQ_RESIZE is set, but it was not being set until CQ creation time, which is _after_ CQ memory registration (the only other place where it is referenced).
As a result, it would always be false during MR registration and would therefore cause irdma_handle_q_mem to populate cqmr->shadow even for GEN_2 HW and beyond:
cqmr->shadow = (dma_addr_t)arr[req->cq_pages];
The issue is that for GEN_2 and beyond, req->cq_pages may be exactly equal to iwmr->page_cnt and therefore equal to the size of arr, which would cause an OOB read by one.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-tools-develUpgrade python3-perfUpgrade perf-debuginfoUpgrade kernel-modules-extraUpgrade kernel-debuginfoUpgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-6.1.180-225.360Upgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade bpftoolUpgrade bpftool-debuginfoUpgrade kernel-modules-extra-commonUpgrade perfUpgrade python3-perf-debuginfoUpgrade kernel-tools | Sep 1, 2026 | Aug 15, 2026 |
| Debian | — | Upgrade linux | Aug 16, 2026 | Aug 16, 2026 |
| Redhat_linux | — | No solution exists | Aug 24, 2026 | Aug 15, 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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