A heap-based buffer overflow was found in libwebp in versions before 1.0.1 in ApplyFilter().

References

• advisory https://chromium.googlesource.com/webm/libwebp/+/1344a2e947c749d231141a295327e5b99b444d63
• patch https://bugzilla.redhat.com/show_bug.cgi?id=1956918
• report https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9105