---
cve: "CVE-2026-12519"
severity: "MEDIUM"
cvss: 5.0
epss: "0.2%"
vendor: "zephyrproject"
kev: false
exploited: false
published: "2026-08-17 16:18:53"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-29T23:30:22+01:00"
---

# CVE-2026-12519

> 5.0 MEDIUM · 🧪 PoC

## Beschreibung

The WNC-M14A2A LTE-M modem driver mishandles unsolicited %NOTIFYEV: events in on_cmd_socknotifyev() (drivers/modem/vendor_standalone/wncm14a2a.c). The response line is linearized into a fixed 40-byte stack buffer via net_buf_linearize(), which caps the copy at 39 bytes and returns out_len

## CNA-Record (Kanon, cvelistV5)

- CNA: **zephyr**
- State: PUBLISHED
- Stand: 2026-08-17 18:22:49
- CNA-CVSS: **5.0** (`CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-787** — Out-of-bounds Write
  The product writes data past the end, or before the beginning, of the intended buffer.

## Patch verfügbar (OSV)

- dccb09599635bdff17633fa7e9dab014b91dce90 (Commit)
- c516cb7c14f8b0537811764daa94bedc50c230f3 (Commit)

## Referenzen

- <https://github.com/zephyrproject-rtos/zephyr/commit/c516cb7c14f8b0537811764daa94bedc50c230f3>
- <https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8hrc-q8cp-6xhf>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-12519/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_