Yüksek CVSS 7.1
CVE-2026-46321: Linux Kernel: güvenlik açığı
Açıklama (NVD)
In the Linux kernel, the following vulnerability has been resolved: tun: free page on short-frame rejection in tun_xdp_one() tun_xdp_one() returns -EINVAL on a frame shorter than ETH_HLEN without freeing the page that vhost_net_build_xdp() allocated for it. tun_sendmsg() discards that -EINVAL and still returns total_len, so vhost_tx_batch() takes the success path and never frees the page; each short frame in a batch leaks one page-frag chunk. A local process that can open /dev/net/tun and /dev/vhost-net can hit this path: it attaches a tun/tap device as the vhost-net backend and feeds TX descriptors whose length minus the virtio-net header is below ETH_HLEN. Each kick leaks the page-frag chunks for that batch, and a tight submission loop exhausts host memory and triggers an OOM panic. Free the page before returning -EINVAL, matching the XDP-program error path in the same function.
Özet bilgiler
- Ürün
- Linux Linux Kernel
- CVSS v3.1
- 7.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - EPSS
- %0,13 (yüzdelik 3)
- Yama
- Mevcut
Etkilenen sürümler
| Ürün | Başlangıç | Bitiş | Düzeltildi |
|---|---|---|---|
| linux-linux-kernel | 5.4.281 | — | 5.5 |
| linux-linux-kernel | 5.10.223 | — | 5.10.259 |
| linux-linux-kernel | 5.15.164 | — | 5.15.210 |
| linux-linux-kernel | 6.1.102 | — | 6.1.176 |
| linux-linux-kernel | 6.6.43 | — | 6.6.143 |
| linux-linux-kernel | 6.9.12 | — | 6.10 |
| linux-linux-kernel | 6.10.2 | — | 6.12.93 |
| linux-linux-kernel | 6.13 | — | 6.18.35 |
| linux-linux-kernel | 6.19 | — | 7.0.12 |
| linux-linux-kernel | 7.1 | 7.1 | — |
| linux-linux-kernel | 7.1 | 7.1 | — |
| linux-linux-kernel | 7.1 | 7.1 | — |
| linux-linux-kernel | 7.1 | 7.1 | — |
| linux-linux-kernel | 7.1 | 7.1 | — |