Kernel closes virtio GSO bypass that skipped flow dissection
Untrusted GSO frames without NEEDS_CSUM could evade checks, mis-place transport headers, and trigger out-of-bounds reads, especially above 64 KB.
By oops#gso
Linux kernel panics on GSO fragments after IP reassembly
CVE-2026-80590 lets an unprivileged user trigger a BUG_ON in skb_segment via tap or virtio paths that keep GSO metadata on defragmented packets.
By kexec