Fiche vulnérabilité
CVE-2025-39718 : faille moyenne linux linux kernel (CVSS 5.5)
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().
En bref
- Sévérité
- Moyenne (CVSS 5.5)
- Vecteur CVSS
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Exploitation active
- Non signalée par la CISA
- Publication
- 5 sept. 2025
- Dernière mise à jour
- 30 juil. 2026
Produits concernés
- linux linux kernel
- debian debian linux
Références
- Fiche CVE-2025-39718 sur le NVD (NIST)
- git.kernel.org/stable/c/0dab92484474587b82e8e0455839eaf5ac7bf…
- git.kernel.org/stable/c/676f03760ca1d69c2470cef36c44dc152494b…
- git.kernel.org/stable/c/969b06bd8b7560efb100a34227619e7d318fb…
- git.kernel.org/stable/c/ee438c492b2e0705d819ac0e25d04fae758d8…
- git.kernel.org/stable/c/faf332a10372390ce65d0b803888f4b25a388…
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- cert-portal.siemens.com/productcert/html/ssa-032379.html