{"id":"CVE-2026-98032","state":"PUBLISHED","title":"tracing: Fix subbuf resize races with trace_pipe_raw readers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix subbuf resize races with trace_pipe_raw readers\n\nConcurrent subbuffer resizes may crash trace_pipe_raw readers or leak\nuninitialized memory to userspace due to stale size values.\n\nModify ring_buffer_alloc_read_page() to handle the resizing of an\nexisting buffer_data_read_page if necessary and add a new\nring_buffer_read_page_size(). This new function enables ring-buffer\nbuffer_data_read_page users to not call the racy\nring_buffer_subbuf_size_get(). This makes the spare_size member of\nftrace_buffer_info redundant.\n\nFinally, handle buffer_data_read_page/reader_page order discrepancy in\nring_buffer_read_page(). On a mismatch simply copy manually the data to\nthe buffer_data_read_page.","publishedAt":"2026-09-25T10:23:48.169Z","updatedAt":"2026-10-21T12:54:06.279Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bce761d757452ba5eb77e11fecc37a04b67494e7","status":"affected","lessThan":"574efd988d116bd56ac688ab2d64e06ba0da982a","versionType":"git"},{"version":"bce761d757452ba5eb77e11fecc37a04b67494e7","status":"affected","lessThan":"3f30b2cd4eba45c05f822f03f1b0f4077d6d4dc3","versionType":"git"},{"version":"bce761d757452ba5eb77e11fecc37a04b67494e7","status":"affected","lessThan":"75b37b8369778b69ce9738d1c97685a1615cb252","versionType":"git"},{"version":"bce761d757452ba5eb77e11fecc37a04b67494e7","status":"affected","lessThan":"dae8dda341d2d9034a90d59e8a7d502e1263813f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/ring_buffer.h","kernel/trace/ring_buffer.c","kernel/trace/ring_buffer_benchmark.c","kernel/trace/trace.c","kernel/trace/trace.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/ring_buffer.h","kernel/trace/ring_buffer.c","kernel/trace/ring_buffer_benchmark.c","kernel/trace/trace.c","kernel/trace/trace.h"]}],"references":["https://git.kernel.org/stable/c/574efd988d116bd56ac688ab2d64e06ba0da982a","https://git.kernel.org/stable/c/3f30b2cd4eba45c05f822f03f1b0f4077d6d4dc3","https://git.kernel.org/stable/c/75b37b8369778b69ce9738d1c97685a1615cb252","https://git.kernel.org/stable/c/dae8dda341d2d9034a90d59e8a7d502e1263813f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98032.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98032","state":"PUBLISHED","datePublished":"2026-09-25T10:23:48.169Z","dateUpdated":"2026-10-21T12:54:06.279Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:19:56.070Z"},"containers":{"cna":{"title":"tracing: Fix subbuf resize races with trace_pipe_raw readers","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix subbuf resize races with trace_pipe_raw readers\n\nConcurrent subbuffer resizes may crash trace_pipe_raw readers or leak\nuninitialized memory to userspace due to stale size values.\n\nModify ring_buffer_alloc_read_page() to handle the resizing of an\nexisting buffer_data_read_page if necessary and add a new\nring_buffer_read_page_size(). This new function enables ring-buffer\nbuffer_data_read_page users to not call the racy\nring_buffer_subbuf_size_get(). This makes the spare_size member of\nftrace_buffer_info redundant.\n\nFinally, handle buffer_data_read_page/reader_page order discrepancy in\nring_buffer_read_page(). On a mismatch simply copy manually the data to\nthe buffer_data_read_page."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bce761d757452ba5eb77e11fecc37a04b67494e7","status":"affected","lessThan":"574efd988d116bd56ac688ab2d64e06ba0da982a","versionType":"git"},{"version":"bce761d757452ba5eb77e11fecc37a04b67494e7","status":"affected","lessThan":"3f30b2cd4eba45c05f822f03f1b0f4077d6d4dc3","versionType":"git"},{"version":"bce761d757452ba5eb77e11fecc37a04b67494e7","status":"affected","lessThan":"75b37b8369778b69ce9738d1c97685a1615cb252","versionType":"git"},{"version":"bce761d757452ba5eb77e11fecc37a04b67494e7","status":"affected","lessThan":"dae8dda341d2d9034a90d59e8a7d502e1263813f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/ring_buffer.h","kernel/trace/ring_buffer.c","kernel/trace/ring_buffer_benchmark.c","kernel/trace/trace.c","kernel/trace/trace.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/ring_buffer.h","kernel/trace/ring_buffer.c","kernel/trace/ring_buffer_benchmark.c","kernel/trace/trace.c","kernel/trace/trace.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/574efd988d116bd56ac688ab2d64e06ba0da982a"},{"url":"https://git.kernel.org/stable/c/3f30b2cd4eba45c05f822f03f1b0f4077d6d4dc3"},{"url":"https://git.kernel.org/stable/c/75b37b8369778b69ce9738d1c97685a1615cb252"},{"url":"https://git.kernel.org/stable/c/dae8dda341d2d9034a90d59e8a7d502e1263813f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:54:06.279Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}