{"id":"CVE-2026-74602","state":"PUBLISHED","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).","publishedAt":"2026-08-22T15:31:50.811Z","updatedAt":"2026-08-23T12:47:43.108Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","status":"affected","lessThan":"7c620d89bae1a926ab7d626600285d3516c9f3c4","versionType":"git"},{"version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","status":"affected","lessThan":"2e37f2bf111429fbfa4d985b12df3ba496ca70aa","versionType":"git"},{"version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","status":"affected","lessThan":"3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a","versionType":"git"},{"version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","status":"affected","lessThan":"6d014e44b68ddd43f71288d2a4dbb1a259869149","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ring_buffer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.105","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.45","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.9","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ring_buffer.c"]}],"references":["https://git.kernel.org/stable/c/7c620d89bae1a926ab7d626600285d3516c9f3c4","https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa","https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a","https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74602.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74602","state":"PUBLISHED","datePublished":"2026-08-22T15:31:50.811Z","dateUpdated":"2026-08-23T12:47:43.108Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.919Z"},"containers":{"cna":{"title":"ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()","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)."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","status":"affected","lessThan":"7c620d89bae1a926ab7d626600285d3516c9f3c4","versionType":"git"},{"version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","status":"affected","lessThan":"2e37f2bf111429fbfa4d985b12df3ba496ca70aa","versionType":"git"},{"version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","status":"affected","lessThan":"3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a","versionType":"git"},{"version":"f9b94daa542a8d2532f0930f01cd9aec2d19621b","status":"affected","lessThan":"6d014e44b68ddd43f71288d2a4dbb1a259869149","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ring_buffer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.105","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.45","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.9","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ring_buffer.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/7c620d89bae1a926ab7d626600285d3516c9f3c4"},{"url":"https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa"},{"url":"https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a"},{"url":"https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-23T12:47:43.108Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.105"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.45"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.1.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}