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Understanding why a packet becomes misformatted is more valuable than a generic “reboot” fix. Here are the technical root causes.
Capture raw communication (e.g., Wireshark, tcpdump). Filter for type 0x96 and compare against protocol specification. Understanding why a packet becomes misformatted is more
During installation of guest additions in a VM, the host hypervisor communicates with the guest via a backdoor channel. If the channel’s protocol version mismatches (e.g., VMware Tools 11.x on an ESXi 6.5 host), a packet of type 0x96 may be used for “host time sync,” and a misformatting will crash the installer. Linux and macOS users encounter this error most
Linux and macOS users encounter this error most often when a repository mirror sends a malformed response. For instance: Why type0x96
Why type0x96? APT uses HTTP/HTTPS, but some internal methods (like Method::https) define proprietary status codes. In rare cases, a server returns an HTTP 150 (0x96) which is not a standard HTTP status code (100–101, 200–206, etc.), leading to a “misformatted” interpretation.