{"id":"CVE-2026-74273","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Block region delete during region creation\n\nExpand the range lock, rename it \"regions_lock\", to disable region deletion\nin the critical period between const…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Block region delete during region creation\n\nExpand the range lock, rename it \"regions_lock\", to disable region deletion\nin the critical period between const…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= a32320b71f085f8d82afedcf285f1682c8c00aed < 98c7e206af48b4433b2192cc1a538db2acc49876","Linux >= a32320b71f085f8d82afedcf285f1682c8c00aed < b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8","Linux >= a32320b71f085f8d82afedcf285f1682c8c00aed < d91feb88692e81b00cd22f0125cfcd04970b4a0b","Linux 6.3"],"published":"2026-08-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:44.707","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74273","references":[{"url":"https://git.kernel.org/stable/c/98c7e206af48b4433b2192cc1a538db2acc49876","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d91feb88692e81b00cd22f0125cfcd04970b4a0b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00198,"epssPercentile":0.08887,"ingestedAt":"2026-10-15T11:00:41.678Z","slug":"CVE-2026-74273","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Block region delete during region creation\n\nExpand the range lock, rename it \"regions_lock\", to disable region deletion\nin the critical period between construct_region() and attach_target(), as\nwell as the period between device_add() and registering the remove actions.\n\nOtherwise, userspace can confuse the kernel. It can violate the assumption\nthe region stays registered through the completion of cxl_add_to_region().\nIt can violate the assumption that devm_add_action_or_reset() is working\nwith a live 'struct cxl_region'.\n\nIt is ok for the region to disappear outside of those windows as that\nmirrors device hotplug flows where the proper locks are held.\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":[]}