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Test your applicationsUpgrade SLES:15.5
grub2-x86_64-efi
to version 2.06-150500.29.43.2 or higher.
Note: Versions mentioned in the description apply only to the upstream grub2-x86_64-efi
package and not the grub2-x86_64-efi
package as distributed by SLES
.
See How to fix?
for SLES:15.5
relevant fixed versions and status.
When reading the language .mo file in grub_mofile_open(), grub2 fails to verify an integer overflow when allocating its internal buffer. A crafted .mo file may lead the buffer size calculation to overflow, leading to out-of-bound reads and writes. This flaw allows an attacker to leak sensitive data or overwrite critical data, possibly circumventing secure boot protections.