{"id":"CVE-2026-43210","state":"PUBLISHED","title":"tracing: ring-buffer: Fix to check event length before using","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: ring-buffer: Fix to check event length before using\n\nCheck the event length before adding it for accessing next index in\nrb_read_data_buffer(). Since this function is used for validating\npossibly broken ring buffers, the length of the event could be broken.\nIn that case, the new event (e + len) can point a wrong address.\nTo avoid invalid memory access at boot, check whether the length of\neach event is in the possible range before using it.","publishedAt":"2026-05-06T11:28:13.609Z","updatedAt":"2026-05-11T22:20:07.951Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55","status":"affected","lessThan":"b4700c089a10f89de3a5149d57f8a58306458982","versionType":"git"},{"version":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55","status":"affected","lessThan":"5026010110a5ad2268d8c23e1e286ab7c736f7ac","versionType":"git"},{"version":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55","status":"affected","lessThan":"9eb80e54494ef1efef8a64bec4ffa672c9cf411e","versionType":"git"},{"version":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55","status":"affected","lessThan":"912b0ee248c529a4f45d1e7f568dc1adddbf2a4a","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":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","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/b4700c089a10f89de3a5149d57f8a58306458982","https://git.kernel.org/stable/c/5026010110a5ad2268d8c23e1e286ab7c736f7ac","https://git.kernel.org/stable/c/9eb80e54494ef1efef8a64bec4ffa672c9cf411e","https://git.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43210.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43210","state":"PUBLISHED","datePublished":"2026-05-06T11:28:13.609Z","dateUpdated":"2026-05-11T22:20:07.951Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.993Z"},"containers":{"cna":{"title":"tracing: ring-buffer: Fix to check event length before using","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: ring-buffer: Fix to check event length before using\n\nCheck the event length before adding it for accessing next index in\nrb_read_data_buffer(). Since this function is used for validating\npossibly broken ring buffers, the length of the event could be broken.\nIn that case, the new event (e + len) can point a wrong address.\nTo avoid invalid memory access at boot, check whether the length of\neach event is in the possible range before using it."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55","status":"affected","lessThan":"b4700c089a10f89de3a5149d57f8a58306458982","versionType":"git"},{"version":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55","status":"affected","lessThan":"5026010110a5ad2268d8c23e1e286ab7c736f7ac","versionType":"git"},{"version":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55","status":"affected","lessThan":"9eb80e54494ef1efef8a64bec4ffa672c9cf411e","versionType":"git"},{"version":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55","status":"affected","lessThan":"912b0ee248c529a4f45d1e7f568dc1adddbf2a4a","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":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","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/b4700c089a10f89de3a5149d57f8a58306458982"},{"url":"https://git.kernel.org/stable/c/5026010110a5ad2268d8c23e1e286ab7c736f7ac"},{"url":"https://git.kernel.org/stable/c/9eb80e54494ef1efef8a64bec4ffa672c9cf411e"},{"url":"https://git.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:20:07.951Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}