Use after free in libwebp

CVE-2023-1999

What is CVE-2023-1999?

A vulnerability exists in libwebp due to improper memory management, specifically a use after free and double free condition. This occurs within the ApplyFiltersAndEncode() function where the best.bw pointer is released in a loop, subsequently leading to an incorrect reassignment. On a second iteration, an out-of-memory error in the VP8 encoder triggers an attempt to free the memory that has already been released, risking exploitation. Attackers can exploit this flaw to potentially execute arbitrary code or cause instability. Users are advised to upgrade to the latest version to mitigate this risk.

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