{"apiVersion":"1.0","identifier":"CVE-2026-74346","description":"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.","publishedAt":"2026-08-15T06:22:35","lastModifiedAt":"2026-08-17T06:19:29","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74346","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00173,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74346","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74346","en":"https://www.redsauce.net/en/cves/CVE-2026-74346","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74346","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74346","de":"https://www.redsauce.net/de/cves/CVE-2026-74346","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74346","el":"https://www.redsauce.net/el/cves/CVE-2026-74346"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74346"}}