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-headers
to version 0:4.18.0-348.el8 or higher.
This issue was patched in RHSA-2021:4356
.
Note: Versions mentioned in the description apply only to the upstream kernel-headers
package and not the kernel-headers
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 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.