High 7.1Published Jun 25, 2026

CVE-2026-53132vsock/virtio: fix potential unbounded skb queue

Updated under an hour ago (Oct 27, 2026, 6:23 PM ET)

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Exploited in the last 30 days

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: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	077706165717686a2a6a71405fef036cd5b37ae0 builds before 1eca304f97a34ed5e921e1f0e06c8b241f25bf12; 077706165717686a2a6a71405fef036cd5b37ae0 builds before 9bdc637fde66b63d6cad0caacd034888bb7bf5f5; 077706165717686a2a6a71405fef036cd5b37ae0 builds before 100d5b2ffdc6468b9e48532641f29e83efdcb63c; 077706165717686a2a6a71405fef036cd5b37ae0 builds before 059b7dbd20a6f0c539a45ddff1573cb8946685b5; 5852a2b573f7a3a29df46296e56aa3491e589cdf; from 6.1.63 before 6.2	CNA record
linux linux_kernel linux:linux_kernel	from 6.1.63 before 6.2; from 6.3.1 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 6.3; 6.3; 6.3; 6.3; and 4 more ranges	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.