Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Linux Linux — vsock/virtio: Validate length in packet header before skb_put()
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0016 5.4 —
AFFECTED
Product Versions Fixed
Linux baddcc2c71572968cdaeee1c4ab3dc0ad90fa765 – —
Linux 6.3 – 6.1.149
TIMELINE
Apr 16 Reserved by Linux
Sep 5 Published (CNA: Linux)
Jul 30 RESCORED — CVE-2025-39718 (Linux). CVSS 8.4 → 5.5 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
vsock/virtio: Validate length in packet header before skb_put()
When receiving a vsock packet in the guest, only the virtqueue buffer
size is validated prior to virtio_vsock_skb_rx_put(). Unfortunately,
virtio_vsock_skb_rx_put() uses the length from the packet header as the
length argument to skb_put(), potentially resulting in SKB overflow if
the host has gone wonky.
Validate the length as advertised by the packet header before calling
virtio_vsock_skb_rx_put().
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| April 16, 2025 | Reserved | Reserved by Linux |
| September 5, 2025 | Published | Published (CNA: Linux) |
| July 30, 2026 | RESCORED | RESCORED — CVE-2025-39718 (Linux). CVSS 8.4 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | baddcc2c71572968cdaeee1c4ab3dc0ad90fa765 | — |
| Linux | Linux | — | 6.3 | 6.1.149 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-39718 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.