Aurélien Jarno

**Name of the Vulnerable Software and Affected Versions** gcc versions 4.3.x **Description** The issue concerns the generation of a cld instruction while compiling functions used for string manipulation, such as `memcpy` and `memmove`, on x86 and i386 architectures. This can prevent the direction flag (DF) from being reset, violating ABI conventions, and potentially cause data to be copied in the wrong direction during signal handling in the Linux kernel. This might allow attackers to trigger memory corruption. **Recommendations** For gcc version 4.3.x, consider updating the compiler to a version that correctly generates the cld instruction for string manipulation functions to prevent potential memory corruption issues.