CVE-2026-53132

vsock/virtio: fix potential unbounded skb queue

CVSS 7.1 HIGHEPSS 0.1%

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.1EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

25 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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)

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/059b7dbd20a6f0c539a45ddff1573cb8946685b5 https://git.kernel.org/stable/c/100d5b2ffdc6468b9e48532641f29e83efdcb63c https://git.kernel.org/stable/c/1eca304f97a34ed5e921e1f0e06c8b241f25bf12 https://git.kernel.org/stable/c/9bdc637fde66b63d6cad0caacd034888bb7bf5f5