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Miggo AIRoot Cause AnalysisThe analysis is based on the stack traces provided in the GitHub issue #460, as no specific commit patch for CVE-2024-38950 in libde265 was available. The vulnerability is reported in 'Libde265 v1.0.15'. The stack traces show crashes occurring in the dec265 example application's SDL display functions (SDL_YUV_Display::display420 and SDL_YUV_Display::display444as420). These functions perform out-of-bounds memory accesses (read and write respectively) when handling image data. The ASan report for the first crash also indicates that the buffer being overflowed was allocated by de265_image_get_buffer (in libde265/image.cc). This suggests that libde265 either allocates an insufficiently sized buffer or provides incorrect image parameters (dimensions, strides) to dec265, leading to the overflow when dec265 processes this data for display. The identified functions are the ones directly executing the out-of-bounds memory operations and would therefore appear in a runtime profile during the vulnerability's exploitation. The function __interceptor_memcpy mentioned in the CVE description is an AddressSanitizer runtime function that detects and reports the overflow, not the vulnerable code itself.
