cvedb.io
CVE-2021-34556
MEDIUM · CVSS 5.5
EPSS exploitation probability: 0%
Published 2021-08-02T05:15:07.663 · Last modified 2026-06-17T03:56:06.993

Summary

In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects the possibility of uninitialized memory locations on the BPF stack.

Affected products

linux — linux_kernel

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.