---
cve: "CVE-2026-74507"
severity: "HIGH"
cvss: 7.1
epss: "24%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-15 13:17:55"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T21:37:05+02:00"
---

# CVE-2026-74507

> 7.1 HIGH

## Beschreibung

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

Bluetooth: HIDP: validate numbered report payloads

When hidp_get_raw_report() waits for a numbered report,
hidp_process_data() compares the expected report number with skb->data[0].
A connected HIDP peer can reply with only a DATA transaction header,
leaving the skb empty after the header is removed.

KMSAN reports an uninitialized-value use in hidp_session_run(), with the
value originating in __alloc_skb() through vhci_write(). The transaction
header checks remove the empty-frame reports, but this report remains until
the payload check is added.

The comparison can also consume a peer-controlled byte beyond the declared
L2CAP PDU. A DATA | FEATURE response followed by an extra 0x01 byte made
the current code accept that byte as report ID 1 and complete
HIDIOCGFEATURE with a zero-byte result. With this change the malformed
response is rejected with -EIO, while a subsequent valid response still
succeeds.

Require a payload byte before comparing a numbered report ID. Unnumbered
reports continue to accept an empty payload.

## CVSS-Vektor

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

| 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 | Gering | warn |
| A Verfügbarkeit | Keine | good |

## 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/011bf4350d941f1995b2bd4b815ee206cacf2b8e>
- <https://git.kernel.org/stable/c/689d8bb7fee96b7196b572b015b6055c6616ce0c>
- <https://git.kernel.org/stable/c/c73beb320f5705e508bf7d385b8cc5ef8d9c8b69>
- <https://git.kernel.org/stable/c/b7ad105d46acd828e424454815e4cd31069e047a>
- <https://git.kernel.org/stable/c/7e7162427659b70ea17cd41b1f79e2e64c246690>
- <https://git.kernel.org/stable/c/27cc0e603355c585f1e5da8398faa4d36d498188>
- <https://git.kernel.org/stable/c/9c841f59e10b5d75c398a3fc6b2da448d2a2276b>
- <https://git.kernel.org/stable/c/34f53d27b81a16a02828c8fdfa4e02badc326f17>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-74507) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_