{"id":"CVE-2026-74334","title":"RDMA/nldev: Fix locking when accessing mr->pd","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/nldev: Fix locking when accessing mr->pd\n\nSashiko points out that, due to rereg_mr, the PD is actually variable and\nall the touches in nldev are racy.\n\nUse mr->dev…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 845c6b355226195dad1f26b300c4830f57034e8b","Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 7a0cbb5721a1da81e902d73b6049f85ca8f3fc0a","Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 05e26f34597e9c38bb5b340d86b179b23673869f","Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < a07cba1296aaa81bf9b914486ca957aaff196247","Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 1a132ee4e655288d9a0937ea5109a0d038431ae9","Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3","Linux 4.18"],"published":"2026-08-15","updated":"2026-09-14","sourceUpdated":"2026-09-14T11:58:43.928Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74334","references":[{"url":"https://git.kernel.org/stable/c/845c6b355226195dad1f26b300c4830f57034e8b"},{"url":"https://git.kernel.org/stable/c/7a0cbb5721a1da81e902d73b6049f85ca8f3fc0a"},{"url":"https://git.kernel.org/stable/c/05e26f34597e9c38bb5b340d86b179b23673869f"},{"url":"https://git.kernel.org/stable/c/a07cba1296aaa81bf9b914486ca957aaff196247"},{"url":"https://git.kernel.org/stable/c/1a132ee4e655288d9a0937ea5109a0d038431ae9"},{"url":"https://git.kernel.org/stable/c/50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3"}],"tags":["cve.org"],"epss":0.00129,"epssPercentile":0.02947,"ingestedAt":"2026-09-14T15:23:07.456Z","slug":"CVE-2026-74334","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/nldev: Fix locking when accessing mr->pd\n\nSashiko points out that, due to rereg_mr, the PD is actually variable and\nall the touches in nldev are racy.\n\nUse mr->device instead of mr->pd->device.\n\nGetting the PD restrack ID is more tricky. To avoid disturbing all the\nhappy paths, add an rdma_restrack_sync() operation which is sort of like\nflush_workqueue() or synchronize_irq(): after it returns, all the old\nnldev touches to the mr are gone and everything sees the new PD. This\nmakes it safe to reach into the PD pointer.\n\n## Affected\n\n- `Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 845c6b355226195dad1f26b300c4830f57034e8b`\n- `Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 7a0cbb5721a1da81e902d73b6049f85ca8f3fc0a`\n- `Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 05e26f34597e9c38bb5b340d86b179b23673869f`\n- `Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < a07cba1296aaa81bf9b914486ca957aaff196247`\n- `Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 1a132ee4e655288d9a0937ea5109a0d038431ae9`\n- `Linux >= da5c8507821573b8ed6e3f47e009f273493ffaf7 < 50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3`\n- `Linux 4.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}