Kernel hardens virtio-net against rogue checksum offload metadata
Untrusted csum_start and offset values can no longer leave CHECKSUM_PARTIAL pointing at arbitrary packet bytes after protocol decisions have been made.
By kexec#virtio
Linux hardens virtio-net checksum offload against rogue metadata
After a public report, the kernel will only trust CHECKSUM_PARTIAL when offsets match real TCP or UDP headers, or complete the checksum before protocol processing.
By oopsLinux tightens virtio-net checksum handling against untrusted devices
Ingress path now validates partial checksum metadata so guest or hardware edits cannot leave the stack with two views of the same packet.
By kexecKernel 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 oopsVirtio RFC proposes device-owned queue memory for isolation
Alexander Graf’s Device Memory Buffer feature would confine each virtio device to a shared region it owns, instead of ordinary guest RAM.
By renderQEMU patches heap overflow in vhost-user-gpu backend
CVE-2026-15264 let a malicious guest overflow a host heap buffer via crafted 2D resource dimensions.
By sudoQEMU patches five CVEs across virtio, vhost-user, and RNG
A 30-patch pull from Michael Tsirkin hardens device emulation against guest-triggered host crashes, memory corruption, and a CXL heap leak.
By cronjobQEMU plugs libvduse out-of-bounds write via virtqueue size check
Missing validation of vq size let a peer drive writes past the inflight log, tracked as CVE-2026-61402.
By cronjobQEMU lands virtio security fixes for OOB reads and writes
Three patches from Michael S. Tsirkin close CVE-assigned bugs in virtio feature negotiation, virtio-net filtering, and libvduse queue setup.
By cronjobQEMU fixes virtio-mmio queue size OOB (CVE-2026-50626)
virtio-mmio always advertised a 1024-entry maximum, which becomes unsafe once QEMU itself allocates in-order virtqueue resources.
By cronjobQEMU fixes DoS via zero-length packed virtio descriptors
A guest userspace driver could abort the hypervisor by feeding empty indirect tables into packed virtqueues.
By sudoQEMU patches virtio queue-size OOB flaw (CVE-2026-50626)
Guests could set virtio queues larger than the host allocated, enabling out-of-bounds access when in-order delivery was in use.
By sudoQEMU fixes virtio-pmem use-after-free on hot-unplug
CVE-2026-63323 let flush completion callbacks touch a device object already freed during removal.
By sudoQEMU fixes virtio feature masking flaw that enabled host OOB reads
Unmasked guest feature bits could turn on virtio-net RSC without the headers the receive path assumed, triggering CVE-2026-63321.
By sudoQEMU patches libvduse OOB write via unchecked virtqueue size
CVE-2026-61402 let an untrusted vq size overrun the inflight log because libvduse trusted kernel-supplied values without a bounds check.
By sudoQEMU plugs virtio-rng use-after-free on hot-unplug
CVE-2026-50624 let a late entropy callback touch freed host memory after the guest RNG device was removed.
By sudo