VYPR
Medium severity5.5NVD Advisory· Published Aug 2, 2021· Updated Jun 17, 2026

CVE-2021-34556

CVE-2021-34556

Description

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.

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Affected products

208

Patches

Vulnerability mechanics

References

6

News mentions

0

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