{"api_version":"1","generated_at":"2026-08-23T08:38:02+00:00","cve":"CVE-2026-74602","urls":{"html":"https://cve.report/CVE-2026-74602","api":"https://cve.report/api/cve/CVE-2026-74602.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74602","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74602"},"summary":{"title":"ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()\n\nIn rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0.\nThis is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if\nwhen freed: free_buffer_page() relies on this value. Align the value\nwith the actual allocation size (buffer::subbuf_order).","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:32","updated_at":"2026-08-22 16:16:32"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a","name":"https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149","name":"https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa","name":"https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74602","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74602","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f9b94daa542a8d2532f0930f01cd9aec2d19621b 2e37f2bf111429fbfa4d985b12df3ba496ca70aa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f9b94daa542a8d2532f0930f01cd9aec2d19621b 3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f9b94daa542a8d2532f0930f01cd9aec2d19621b 6d014e44b68ddd43f71288d2a4dbb1a259869149 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 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":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/trace/ring_buffer.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2e37f2bf111429fbfa4d985b12df3ba496ca70aa","status":"affected","version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","versionType":"git"},{"lessThan":"3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a","status":"affected","version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","versionType":"git"},{"lessThan":"6d014e44b68ddd43f71288d2a4dbb1a259869149","status":"affected","version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/trace/ring_buffer.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.8"},{"lessThan":"6.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","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":"6.18.45","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()\n\nIn rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0.\nThis is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if\nwhen freed: free_buffer_page() relies on this value. Align the value\nwith the actual allocation size (buffer::subbuf_order)."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:31:50.811Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa"},{"url":"https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a"},{"url":"https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149"}],"title":"ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74602","datePublished":"2026-08-22T15:31:50.811Z","dateReserved":"2026-08-15T05:44:03.919Z","dateUpdated":"2026-08-22T15:31:50.811Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:32","lastModifiedDate":"2026-08-22 16:16:32","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74602","Ordinal":"1","Title":"ring-buffer: Initialise reader page order in rb_allocate_cpu_buf","CVE":"CVE-2026-74602","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74602","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()\n\nIn rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0.\nThis is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if\nwhen freed: free_buffer_page() relies on this value. Align the value\nwith the actual allocation size (buffer::subbuf_order).","Type":"Description","Title":"ring-buffer: Initialise reader page order in rb_allocate_cpu_buf"}]}}}