{"id":"CVE-2026-43210","summary":"tracing: ring-buffer: Fix to check event length before using","details":"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.","modified":"2026-07-15T01:49:18.660876185Z","published":"2026-05-06T11:28:13.609Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43210.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5026010110a5ad2268d8c23e1e286ab7c736f7ac"},{"type":"WEB","url":"https://git.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9eb80e54494ef1efef8a64bec4ffa672c9cf411e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b4700c089a10f89de3a5149d57f8a58306458982"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43210.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43210"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55"},{"fixed":"b4700c089a10f89de3a5149d57f8a58306458982"},{"fixed":"5026010110a5ad2268d8c23e1e286ab7c736f7ac"},{"fixed":"9eb80e54494ef1efef8a64bec4ffa672c9cf411e"},{"fixed":"912b0ee248c529a4f45d1e7f568dc1adddbf2a4a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43210.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"6.12.75"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43210.json"}}],"schema_version":"1.7.5"}