---
cve: "CVE-2026-74497"
severity: "HIGH"
cvss: 8.4
epss: "14%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-15 13:17:54"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T02:18:51+02:00"
---

# CVE-2026-74497

> 8.4 HIGH

## Beschreibung

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

ALSA: usb-audio: Clamp frame size in implicit-feedback mode

snd_usb_handle_sync_urb() scales received sync packet sizes by the sender's
stride and stores the result directly in out_packet->packet_size[i]. If a
connected USB device sends an oversized sync packet, this frame count can
exceed ep->maxframesize.

The un-clamped frame count then propagates to the playback endpoint queue,
potentially driving packet transfers beyond the endpoint's hardware frame
limits.

Cap the calculated frame count against ep->maxframesize in
snd_usb_handle_sync_urb() to prevent oversized packets from entering the
playback queue.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.265
- Kernel ≥ 5.15.216
- Kernel ≥ 6.1.183
- Kernel ≥ 6.6.151
- Kernel ≥ 6.12.103
- Kernel ≥ 6.18.44
- Kernel ≥ 7.1.8

## Referenzen

- <https://git.kernel.org/stable/c/2d39fea6d3c19a2f5811d123114d92e3d0115fd1>
- <https://git.kernel.org/stable/c/09cf3dbbb4256a43feb91d2f51f274510a9ada47>
- <https://git.kernel.org/stable/c/cfa8d3e0e8b812c4db4d5241f62b6bdbab2bd7be>
- <https://git.kernel.org/stable/c/56ac3e7c90f6b45969c3fd07a98fad760ffd6901>
- <https://git.kernel.org/stable/c/be97fea7451d758881b95af78e900dd0d58a382a>
- <https://git.kernel.org/stable/c/2db4535d6af79276a64449201c5be5feffb31c64>
- <https://git.kernel.org/stable/c/53f0aa37eb945f3c983f61d12fc35eb33debb8a9>
- <https://git.kernel.org/stable/c/8d7a30c50c2e58a6839634ed0acde14466d1dc61>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-74497) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_