{"cve":"CVE-2026-74390","nvd":{"published":"2026-08-15T06:22:40.947","modified":"2026-10-16T20:17:24.820","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Fix out-of-bounds write in irdma_copy_user_pgaddrs\n\nThe irdma_copy_user_pgaddrs function loops through all of the umem DMA\nblocks to populate the PBLEs and will stop when either the last DMA\nblock is reached or palloc->total_cnt is reached. The issue is that\nthe logic for checking palloc->total_cnt would only work for non-zero\nvalues.\n\nWhen irdma_setup_pbles is called with lvl==0, it\ncalls irdma_copy_user_pgaddrs with palloc->total_cnt==0, which means\nthe only way to break out of the loop is to reach the last umem DMA\nblock, which means it could end up going beyond the fixed size of 4\niwmr->pgaddrmem array that is used in the lvl==0 case.\n\nIn the case of QP/CQ/SRQ rings, the value of lvl is determined by a\nseparate input (for example, req.cq_pages in the case of a CQ). So,\nwe must perform explicit checking to ensure we don't overflow the\npgaddrmem array if the user provides a umem that consists of more\nblocks than their provided req.cq_pages.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://git.kernel.org/stable/c/192a3be0e3759daa24af2841208b074ca6dbaabc","https://git.kernel.org/stable/c/424d51d33c7541a86934067c2c0538124687fc90","https://git.kernel.org/stable/c/4780f58672ee6328accd54a95f9c00683477e499","https://git.kernel.org/stable/c/5ebb3ed757be3e04cf803026004aa0beaeb13e9b","https://git.kernel.org/stable/c/79a20a8e201a779224b4bf115250a7713bde72c0"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:10.689564601+00:00"},"epss":{"cve":"CVE-2026-74390","score":0.0013,"percentile":0.02583,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}