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
grub2-efi-aa64-cdboot
to version 1:2.02-87.el8_2.3 or higher.
This issue was patched in RHSA-2021:0697
.
Note: Versions mentioned in the description apply only to the upstream grub2-efi-aa64-cdboot
package and not the grub2-efi-aa64-cdboot
package as distributed by RHEL
.
See How to fix?
for RHEL:8
relevant fixed versions and status.
A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.