---
cve: "CVE-2026-74410"
severity: "HIGH"
cvss: 8.1
epss: "28%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-15 05:59:18"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T08:57:35+02:00"
---

# CVE-2026-74410

> 8.1 HIGH

## Beschreibung

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

wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer

In rtw_pci_rx_napi(), new_len is computed as the sum of pkt_len (14-bit
descriptor field, max 16383) and pkt_offset (drv_info_sz + shift, both
firmware-controlled). The result can exceed RTK_PCI_RX_BUF_SIZE (11478),
causing an out-of-bounds read from the pre-allocated DMA buffer when
skb_put_data copies new_len bytes. The USB transport already validates
this (rtw_usb_rx_data_put checks against RTW_USB_MAX_RECVBUF_SZ); the
PCIe path does not.

Add a check that new_len does not exceed the DMA buffer size.

## CVSS-Vektor

```
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/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 | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.261
- Kernel ≥ 5.15.212
- Kernel ≥ 6.1.178
- Kernel ≥ 6.6.145
- Kernel ≥ 6.12.97
- Kernel ≥ 6.18.40
- Kernel ≥ 7.1.5

## Referenzen

- <https://git.kernel.org/stable/c/913bd7d3d3d842b5c1d2b908a0201efa8fc79793>
- <https://git.kernel.org/stable/c/45abc14ab3f15da7d689f1a8809c1a01240a94d9>
- <https://git.kernel.org/stable/c/08193e733e5d4790e6c937af86d78793b02709be>
- <https://git.kernel.org/stable/c/6a3c384393d3f0b41669ed5a2e88744aad9d87c8>
- <https://git.kernel.org/stable/c/26c183a86ea4dd1f2ff90c6f783649e7f5722a10>
- <https://git.kernel.org/stable/c/01155ded5d4dad61840a9a3c33ab56778ef1f100>
- <https://git.kernel.org/stable/c/1554fa522f16ec7c5c342ad33fe734eeb6eb2452>
- <https://git.kernel.org/stable/c/6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-74410) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_