{"id":"CVE-2026-99160","aliases":[],"title":"ring-buffer: Do not show buffer_meta for CPUs without a buffer","titleSource":"Linux","descriptionSource":"Linux","products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"950032ffcee7a43c960951940059afc5a2bdbcbc","status":"affected","lessThan":"8512d0312cc0ea83ca4511b164c29a138bbb0c21","versionType":"git"},{"version":"950032ffcee7a43c960951940059afc5a2bdbcbc","status":"affected","lessThan":"ae670c1a24fb5ffb167f26358cf47a5f0abbd670","versionType":"git"},{"version":"950032ffcee7a43c960951940059afc5a2bdbcbc","status":"affected","lessThan":"3f23cae09a4677a3f7c163a68388512cb231ff22","versionType":"git"}],"defaultStatus":"unaffected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99160"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99160"}],"remediation":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Do not show buffer_meta for CPUs without a buffer\n\nThe per_cpu/cpuN/buffer_meta files are created for every possible CPU,\nbut buffer->buffers[cpu] is only allocated once that CPU comes online.\nReading the file of a CPU that never came online dereferences a NULL\ncpu_buffer in rbm_start().\n\nFail the open with -ENODEV when the CPU has no buffer, as the other\nper CPU ring buffer interfaces do.","severity":"unknown","score":null,"published":"2026-10-28T10:35:13.341Z","modified":"2026-10-28T10:35:13.341Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://git.kernel.org/stable/c/8512d0312cc0ea83ca4511b164c29a138bbb0c21","https://git.kernel.org/stable/c/ae670c1a24fb5ffb167f26358cf47a5f0abbd670","https://git.kernel.org/stable/c/3f23cae09a4677a3f7c163a68388512cb231ff22"],"sources":[{"name":"CVE","id":"CVE-2026-99160","modified":"2026-10-28T10:35:13.341Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99160"}],"assessments":[],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T05:05:31.777Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}