CVE-2026-99160
ring-buffer: Do not show buffer_meta for CPUs without a buffer
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Do not show buffer_meta for CPUs without a buffer The per_cpu/cpuN/buffer_meta files are created for every possible CPU, but buffer->buffers[cpu] is only allocated once that CPU comes online. Reading the file of a CPU that never came online dereferences a NULL cpu_buffer in rbm_start(). Fail the open with -ENODEV when the CPU has no buffer, as the other per CPU ring buffer interfaces do.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Oct 28, 2026 |
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Affected Versions
Linux / Linux
950032ffcee7a43c960951940059afc5a2bdbcbc < 8512d0312cc0ea83ca4511b164c29a138bbb0c21 950032ffcee7a43c960951940059afc5a2bdbcbc < ae670c1a24fb5ffb167f26358cf47a5f0abbd670 950032ffcee7a43c960951940059afc5a2bdbcbc < 3f23cae09a4677a3f7c163a68388512cb231ff22
Linux / Linux
6.12