CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's crypto subsystem, specifically the RSA key parser, where improper handling of CRT component lengths can lead to memory corruption due to out-of-bounds writes. This flaw poses a high risk, as it could potentially allow an attacker to exploit the memory corruption for arbitrary code execution or system crashes. Organizations using affected Linux systems, particularly those relying on cryptographic operations, should prioritize patching this vulnerability to mitigate the associated risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: crypto: qat - validate RSA CRT component lengths The generic RSA key parser (rsa_helper.c) bounds each CRT component (p, q, dp, dq, qinv) by the modulus size n_sz, but qat_rsa_setkey_crt() allocates half-size DMA buffers (key_sz / 2) and right-aligns each component with: memcpy(dst + half_key_sz - len, src, len) When a CRT component is larger than half_key_sz the subtraction underflows and memcpy writes past the DMA buffer, causing memory corruption. Add a len > half_key_sz check next to the existing !len check for each of the five CRT components so the driver falls back to the non-CRT path instead of writing out of bounds.