The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade RHEL:8
kernel-rt-debug-modules
to version 0:4.18.0-348.rt7.130.el8 or higher.
This issue was patched in RHSA-2021:4140
.
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-modules
package and not the kernel-rt-debug-modules
package as distributed by RHEL
.
See How to fix?
for RHEL:8
relevant fixed versions and status.
kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.