VULNERABILITY INTELLIGENCE
CVE-2023-40548
CVSS score7.4 HIGH
EPSS probability0.44%
CISA KEVNot currently listed
Published2024-01-29
Last modified2026-06-26
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Weakness classification
- secalert@redhat.com: CWE-190
- nvd@nist.gov: CWE-190