CVE-2024-53193: 
Linux Debian vulnerability analysis and mitigation

In the Linux kernel, a memory corruption vulnerability was discovered in the clk-loongson2 driver. The issue (CVE-2024-53193) stems from incorrect placement of a flexible array member within the struct loongson2clkprovider structure, which could lead to memory corruption. The vulnerability was discovered and patched in December 2024 (Kernel Git).

The vulnerability occurs in the loongson2clkprobe() function where heap space is allocated for a flexible structure struct clkhwonecelldata and its flexible-array member hws through the composite structure struct loongson2clkprovider. When data is written into the flexible array using clp->clkdata.hws[p->id] = hw, it corrupts the clklock spinlock variable that immediately follows the clkdata member in the structure. This happens because the flexible structure is incorrectly placed in the middle of struct loongson2clkprovider instead of at the end (Kernel Git).

The vulnerability can lead to memory corruption in the Linux kernel's clock management subsystem for Loongson2 platforms. This could potentially affect system stability and security by corrupting critical kernel memory structures (NVD).

The vulnerability has been fixed by moving the struct clkhwonecelldata clkdata member to the end of struct loongson2clkprovider. The fix also includes a code comment to prevent similar issues in future modifications. Users should update their Linux kernel to a version that includes this fix (Ubuntu Security).