{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b48c24c2d710cf34810c555dcef883a3d35a9c08"
            },
            {
              "fixed": "a80b3b13786e9ab1c52b31a1f16c7d6708fa9220"
            },
            {
              "fixed": "3159c6fac43dc24b34d31971884d98a7a1bf4c4b"
            },
            {
              "fixed": "ad360a31092a870633ec255b96f50181628b4de0"
            },
            {
              "fixed": "d566002de555b18cc395012c5c1cb8682fc6d2a9"
            },
            {
              "fixed": "54cab78df0375196aaec4e3109191653d21751df"
            },
            {
              "fixed": "d5aa82da8f65562da996d184686db9d0ea718b91"
            },
            {
              "fixed": "4385ddd654d90245eeb83b3cb539670ab5c85ba4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.14.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74346.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Fix OOB read during CQ MR registration\n\nSashiko pointed out an unrelated bug during a previous patch:\nhttps://sashiko.dev/#/patchset/20260512183852.614045-1-jmoroni%40google.com\n\nThis change fixes the bug by eliminating the cqmr-\u003esplit field which\nwas not being set properly and instead just checks the CQ resize\nfeature flag directly.\n\nThe cqmr-\u003esplit field essentially tracks whether IRDMA_FEATURE_CQ_RESIZE\nis set, but it was not being set until CQ creation time, which is _after_\nCQ memory registration (the only other place where it is referenced).\n\nAs a result, it would always be false during MR registration and would\ntherefore cause irdma_handle_q_mem to populate cqmr-\u003eshadow even for GEN_2\nHW and beyond:\n\n    cqmr-\u003eshadow = (dma_addr_t)arr[req-\u003ecq_pages];\n\nThe issue is that for GEN_2 and beyond, req-\u003ecq_pages may be exactly equal\nto iwmr-\u003epage_cnt and therefore equal to the size of arr, which would cause\nan OOB read by one.",
  "id": "CVE-2026-74346",
  "modified": "2026-08-18T03:31:26.140951214Z",
  "published": "2026-08-15T05:58:34.606Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3159c6fac43dc24b34d31971884d98a7a1bf4c4b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4385ddd654d90245eeb83b3cb539670ab5c85ba4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54cab78df0375196aaec4e3109191653d21751df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a80b3b13786e9ab1c52b31a1f16c7d6708fa9220"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad360a31092a870633ec255b96f50181628b4de0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d566002de555b18cc395012c5c1cb8682fc6d2a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5aa82da8f65562da996d184686db9d0ea718b91"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74346.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74346"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "RDMA/irdma: Fix OOB read during CQ MR registration"
}