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_2.10 or higher.
This issue was patched in RHSA-2022:5100
.
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.
Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer.