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Test your applicationsUpgrade SLES:15.4
grub2-s390x-emu
to version 2.06-150400.11.55.2 or higher.
Note: Versions mentioned in the description apply only to the upstream grub2-s390x-emu
package and not the grub2-s390x-emu
package as distributed by SLES
.
See How to fix?
for SLES:15.4
relevant fixed versions and status.
A flaw was found in grub2. When reading a symbolic link's name from a UFS filesystem, grub2 fails to validate the string length taken as an input. The lack of validation may lead to a heap out-of-bounds write, causing data integrity issues and eventually allowing an attacker to circumvent secure boot protections.