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CVE-2021-34556
Date: August 2, 2021
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.
Severity Score
Related Resources (11)
Severity Score
Weakness Type (CWE)
Observable Discrepancy
CWE-203CVSS v3
Base Score: |
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Attack Vector (AV): | |
Attack Complexity (AC): | |
Privileges Required (PR): | |
User Interaction (UI): | |
Scope (S): | |
Confidentiality (C): | NONE |
Integrity (I): | NONE |
Availability (A): | PARTIAL |
CVSS v2
Base Score: |
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Access Vector (AV): | |
Access Complexity (AC): | |
Authentication (AU): | |
Confidentiality (C): | NONE |
Integrity (I): | NONE |
Availability (A): | HIGH |
Additional information: |