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In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Do not show buffermeta for CPUs without a buffer The…

CVE-2026-99160

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Do not show buffermeta for CPUs without a buffer The percpu/cpuN/buffermeta 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 cpubuffer in rbmstart(). Fail the open with -ENODEV when the CPU has no buffer, as the other per CPU ring buffer interfaces do.

Assessment

CVSS
Not yet scored
Severity
Unscored
Known exploited
Not listed in CISA KEV
Exploit availability
Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published
28 October 2026
Last updated
30 October 2026
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67

At the source

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