---
cve: "CVE-2026-46320"
severity: "HIGH"
cvss: 7.4
epss: "24%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-06-09 13:16:37"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T09:47:36+02:00"
---

# CVE-2026-46320

> 7.4 HIGH

## Beschreibung

In the Linux kernel, the following vulnerability has been resolved:

tap: free page on error paths in tap_get_user_xdp()

tap_get_user_xdp() rejects a frame shorter than ETH_HLEN with -EINVAL,
and returns -ENOMEM when build_skb() fails. Both paths jump to the err
label without freeing the page that vhost_net_build_xdp() allocated for
the frame. tap_sendmsg() discards the per-buffer return value and always
returns 0, so vhost_tx_batch() takes the success path and never frees
the page; each rejected frame in a batch leaks one page-frag chunk.

Free the page on both error paths, before the skb is built. This is the
tap counterpart of the same leak in tun_xdp_one().

## CVSS-Vektor

```
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.259
- Kernel ≥ 5.15.210
- Kernel ≥ 6.1.176
- Kernel ≥ 6.6.143
- Kernel ≥ 6.12.94
- Kernel ≥ 6.18.36
- Kernel ≥ 7.0.12

## Referenzen

- <https://git.kernel.org/stable/c/8d03e65eb6cfbffec471a6b65416f93679bf3286>
- <https://git.kernel.org/stable/c/f979971835dddbca86cf99e3b2e2b94a408a1ab2>
- <https://git.kernel.org/stable/c/3f52a86a482a69294c50a5a2a097bd6f4104990a>
- <https://git.kernel.org/stable/c/d30aac0fa00ca0afc3e08174cf7f974a66bdcf05>
- <https://git.kernel.org/stable/c/d68eab61944a9b0826fa2e954e42db1aa3201b7a>
- <https://git.kernel.org/stable/c/e27c17346628cb56843a83f93ac63c314c00f388>
- <https://git.kernel.org/stable/c/18a84c35842e19cd3c5534d8cee73d31863f696d>
- <https://git.kernel.org/stable/c/3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-46320) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_