CVE-2026-74613: vsock/virtio: avoid refilling the RX queue after teardown
CSIRTS triage
- What
- Vulnerability in vsock/virtio driver where the RX queue is refilled after the socket has been torn down.
- Who is affected
- Virtual machine deployments using vsock for host-guest communication on vulnerable kernel versions.
- Urgency
- Medium urgency; not currently exploited but refilling after teardown can cause denial of service or crashes.
- Action
- Apply kernel patch preventing RX queue refill after vsock/virtio teardown.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74613
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-746130.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-74613 | coverage & exploitation status | NVD · CVE.org |
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