The HTTP3 dissector could crash when decrypting traffic using a keylog file or loading a capture file that contains decryption secrets.

Impact

Discovered by Sébastien Féry. We are unaware of any exploits for this issue. It may be possible to make Wireshark crash by injecting a malformed packet onto the wire or by convincing someone to read a malformed packet trace file.

Resolution

Upgrade to Wireshark 4.6.2 or later.