CVE-2026-99160unknown
ring-buffer: Do not show buffer_meta for CPUs without a buffer
Impact
In the Linux kernel, the following vulnerability has been resolved:
Source excerpt · LinuxAffected packages
This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
Linux · Linux
Other versions: unaffected
| Version / range | Source status |
|---|---|
| 950032ffcee7a43c960951940059afc5a2bdbcbc to before 8512d0312cc0ea83ca4511b164c29a138bbb0c21 | affected |
| 950032ffcee7a43c960951940059afc5a2bdbcbc to before ae670c1a24fb5ffb167f26358cf47a5f0abbd670 | affected |
| 950032ffcee7a43c960951940059afc5a2bdbcbc to before 3f23cae09a4677a3f7c163a68388512cb231ff22 | affected |
Linux · Linux
Other versions: affected
| Version / range | Source status |
|---|---|
| 6.12 | affected |
| 0 to before 6.12 | unaffected |
| 6.18.59 through 6.18.* (inclusive) | unaffected |
| 7.2.13 through 7.2.* (inclusive) | unaffected |
| 7.3 through * (inclusive) | unaffected |
Original source 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.