CVE-2023-40548 Information

Description

A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.

Reference

https://access.redhat.com/security/cve/CVE-2023-40548 https://bugzilla.redhat.com/show_bug.cgi?id=2241782