---
cve: "CVE-2026-31405"
severity: "CRITICAL"
cvss: 9.8
epss: "55%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-04-06 08:16:38"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-15T18:01:35+02:00"
---

# CVE-2026-31405

> 9.8 CRITICAL

## Beschreibung

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

media: dvb-net: fix OOB access in ULE extension header tables

The ule_mandatory_ext_handlers[] and ule_optional_ext_handlers[] tables
in handle_one_ule_extension() are declared with 255 elements (valid
indices 0-254), but the index htype is derived from network-controlled
data as (ule_sndu_type & 0x00FF), giving a range of 0-255. When
htype equals 255, an out-of-bounds read occurs on the function pointer
table, and the OOB value may be called as a function pointer.

Add a bounds check on htype against the array size before either table
is accessed. Out-of-range values now cause the SNDU to be discarded.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| 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 ≥ 5.10.253
- Kernel ≥ 5.15.203
- Kernel ≥ 6.1.167
- Kernel ≥ 6.6.130
- Kernel ≥ 6.12.78
- Kernel ≥ 6.18.19
- Kernel ≥ 6.19.9

## Referenzen

- <https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629>
- <https://git.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0>
- <https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8>
- <https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30>
- <https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e>
- <https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe>
- <https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92>
- <https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-31405) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_