Gitoxide gix-pack before 0.75.0 contains an uncontrolled memory allocation vulnerability that allows remote attackers to abort the process by supplying a huge pack-header object count. Malicious remotes can serve a 12-byte pack header claiming 0xFFFFFFFF objects, forcing Tree::withcapacity to reserve hundreds of gigabytes and crash clone or fetch operations.

gitoxide gix-pack before 0.75.0 contains a reachable assertion in BytesToEntriesIter::newfromheader: the pack header decoder accepts version 3, but a release-enabled asserteq! requires version 2. A malicious remote can send a 12-byte pack header declaring version 3 to panic the client and abort the clone or fetch.

Gitoxide gix-pack before 0.75.0 contains a denial of service vulnerability that allows malicious remotes to crash fetch operations by sending crafted thin-pack OFSDELTA entries. Attackers can serve a thin pack with a REFDELTA referencing an existing object followed by an OFSDELTA whose basedistance exceeds packoffset, triggering a panic in LookupRefDeltaObjectsIter that aborts the fetch process.