HighFix available
vsock/virtio: fix potential unbounded skb queue
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix potential unbounded skb queue virtio_transport_inc_rx_pkt() checks vvs->rx_bytes + len > vvs->buf_alloc. virtio_transport_recv_enqueue() skips coalescing for packets with VIRTIO_VSOCK_SEQ_EOM. If fed with packets with len == 0 and VIRTIO_VSOCK_SEQ_EOM, a very large number of packets can be queued because vvs->rx_bytes stays at 0. Fix this by estimating the skb metadata size: (Number of skbs in the queue) * SKB_TRUESIZE(0)
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.12.94, 6.18.36, 7.0.13
- CVEs
- CVE-2026-53132
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 06:06 UTC · Revision 1
Source evidence
vsock/virtio: fix potential unbounded skb queue
core-osv · Original sourcePublished 25 Jun 2026, 08:38 UTC
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix potential unbounded skb queue virtio_transport_inc_rx_pkt() checks vvs->rx_bytes + len > vvs->buf_alloc. virtio_transport_recv_enqueue() skips coalescing for packets with VIRTIO_VSOCK_SEQ_EOM. If fed with packets with len == 0 and VIRTIO_VSOCK_SEQ_EOM, a very large number of packets can be queued because vvs->rx_bytes stays at 0. Fix this by estimating the skb metadata size: (Number of skbs in the queue) * SKB_TRUESIZE(0)
osv:CVE-2026-53132
Kernel
Fixed versions: 6.12.94, 6.18.36, 7.0.13
Complete source record
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"title": "vsock/virtio: fix potential unbounded skb queue",
"summary": "In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix potential unbounded skb queue virtio_transport_inc_rx_pkt() checks vvs->rx_bytes + len > vvs->buf_alloc. virtio_transport_recv_enqueue() skips coalescing for packets with VIRTIO_VSOCK_SEQ_EOM. If fed with packets with len == 0 and VIRTIO_VSOCK_SEQ_EOM, a very large number of packets can be queued because vvs->rx_bytes stays at 0. Fix this by estimating the skb metadata size: (Number of skbs in the queue) * SKB_TRUESIZE(0)",
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"modified": "2026-10-28T02:30:42.890308217Z",
"provider": "osv",
"references": [
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"https://nvd.nist.gov/vuln/detail/CVE-2026-53132",
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"source_id": "core-osv",
"document_id": 510959,
"published_at": "2026-06-25T08:38:21.575+00:00"
}