Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 950032ffcee7a43c960951940059afc5a2bdbcbc, < 445bc0e0ed7b3f69b78a0fd8d3a8fdb4e20bc379; >= 950032ffcee7a43c960951940059afc5a2bdbcbc, < 8512d0312cc0ea83ca4511b164c29a138bbb0c21; >= 950032ffcee7a43c960951940059afc5a2bdbcbc, < ae670c1a24fb5ffb167f26358cf47a5f0abbd670; >= 950032ffcee7a43c960951940059afc5a2bdbcbc, < 3f23cae09a4677a3f7c163a68388512cb231ff22 |
| Linux | Linux | 6.12 |
References
Timeline
- Published
- Oct 28, 2026
- Last modified
- Oct 30, 2026
- NVD status
- Received