cve/2023/CVE-2023-40548.md

### [CVE-2023-40548](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-40548)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%207&color=blue)
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![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%208.2%20Advanced%20Update%20Support&color=blue)
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![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%208.4%20Advanced%20Mission%20Critical%20Update%20Support&color=blue)
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![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%208.6%20Extended%20Update%20Support&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%208.8%20Extended%20Update%20Support&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%209&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%209.0%20Extended%20Update%20Support&color=blue)
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### 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.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds