CyberRota Analysis
AI-GeneratedA vulnerability in the Linux kernel's elliptic curve cryptography (ECC) implementation can lead to incorrect carry flag calculations during vli multiplication, potentially allowing attackers to exploit this flaw for unauthorized access or data manipulation. This high-severity issue (CVSS 8.8) primarily affects systems utilizing ECC for cryptographic operations, and organizations relying on Linux for secure communications should prioritize applying the relevant patches to mitigate the risk.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: crypto: ecc - Fix carry overflow in vli multiplication The carry flag calculation fails when r01.m_high is saturated (0xFFFFFFFFFFFFFFFF) and addition of lower bits overflows. The condition (r01.m_high < product.m_high) doesn't handle the case where r01.m_high == product.m_high and an additional carry exists from lower-bit overflow. When commit 3c4b23901a0c ("crypto: ecdh - Add ECDH software support") introduced crypto/ecc.c, it split the muladd() function in the micro-ecc library into separate mul_64_64() and add_128_128() helpers. It seems the check got lost in translation. Add proper handling for this boundary by accounting for the carry from the lower addition.