CVE-2023-1999 Information

Description

There exists a use after free/double free in libwebp. An attacker can use the ApplyFiltersAndEncode() function and loop through to free best.bw and assign best = trial pointer. The second loop will then return 0 because of an Out of memory error in VP8 encoder the pointer is still assigned to trial and the AddressSanitizer will attempt a double free. 

Reference

https://chromium.googlesource.com/webm/libwebp