{"id":"CVE-2026-97421","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()\n\nSeveral corner cases, especially important on 32 bits:\n\n- umem->iova is u64, the function a…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()\n\nSeveral corner cases, especially important on 32 bits:\n\n- umem->iova is u64, the function a…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ae3cf7d2c4d506c5c91746321644e1a08d989e2a","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5fc5b73109540809b094710fac44da81dd8a3ff8","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 09ea6837a0434fb4db99528a5055b6d822135dcf","Linux < 6.12.111","Linux < 6.18.53","Linux (all versions)"],"published":"2026-09-24","updated":"2026-09-24","sourceUpdated":"2026-09-24T17:17:19.993","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97421","references":[{"url":"https://git.kernel.org/stable/c/09ea6837a0434fb4db99528a5055b6d822135dcf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5fc5b73109540809b094710fac44da81dd8a3ff8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ae3cf7d2c4d506c5c91746321644e1a08d989e2a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-24T16:47:15.884Z","slug":"CVE-2026-97421","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()\n\nSeveral corner cases, especially important on 32 bits:\n\n- umem->iova is u64, the function argument should pass in u64 or\n  iova will be truncated\n- Check that the length is not too large for the iova\n- Check that lengths > 4G don't overflow the GENMASK\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}