{"api_version":"1","generated_at":"2026-08-21T19:01:03+00:00","cve":"CVE-2026-74273","urls":{"html":"https://cve.report/CVE-2026-74273","api":"https://cve.report/api/cve/CVE-2026-74273.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74273","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74273"},"summary":{"title":"cxl/region: Block region delete during region creation","description":"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 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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:26","updated_at":"2026-08-17 06:19:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8","name":"https://git.kernel.org/stable/c/b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d91feb88692e81b00cd22f0125cfcd04970b4a0b","name":"https://git.kernel.org/stable/c/d91feb88692e81b00cd22f0125cfcd04970b4a0b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74273","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74273","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a32320b71f085f8d82afedcf285f1682c8c00aed b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a32320b71f085f8d82afedcf285f1682c8c00aed d91feb88692e81b00cd22f0125cfcd04970b4a0b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"74273","cve":"CVE-2026-74273","epss":"0.001550000","percentile":"0.051840000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:46"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/cxl/core/port.c","drivers/cxl/core/region.c","drivers/cxl/cxl.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8","status":"affected","version":"a32320b71f085f8d82afedcf285f1682c8c00aed","versionType":"git"},{"lessThan":"d91feb88692e81b00cd22f0125cfcd04970b4a0b","status":"affected","version":"a32320b71f085f8d82afedcf285f1682c8c00aed","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/cxl/core/port.c","drivers/cxl/core/region.c","drivers/cxl/cxl.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.3"},{"lessThan":"6.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"6.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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 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."}],"providerMetadata":{"dateUpdated":"2026-08-17T05:16:17.155Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8"},{"url":"https://git.kernel.org/stable/c/d91feb88692e81b00cd22f0125cfcd04970b4a0b"}],"title":"cxl/region: Block region delete during region creation","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74273","datePublished":"2026-08-15T05:57:46.134Z","dateReserved":"2026-08-15T05:44:03.879Z","dateUpdated":"2026-08-17T05:16:17.155Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:26","lastModifiedDate":"2026-08-17 06:19:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74273","Ordinal":"1","Title":"cxl/region: Block region delete during region creation","CVE":"CVE-2026-74273","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74273","Ordinal":"1","NoteData":"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 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.","Type":"Description","Title":"cxl/region: Block region delete during region creation"}]}}}