CVE-2021-34556
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability36. percentile0.4%
Product
Linux Kernel
PublishedAug 2, 2021
First seenAug 2, 2021
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v ≤ 5.13.7 | — |
| fedoraproject fedora | 33, 34 | — |
| debian debian_linux | 9.0 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.