---
cve: "CVE-2026-53225"
severity: "CRITICAL"
cvss: 9.1
epss: "51%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-06-25 09:16:40"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-05T06:41:36+02:00"
---

# CVE-2026-53225

> 9.1 CRITICAL

## Beschreibung

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

sctp: fix uninit-value in __sctp_rcv_asconf_lookup()

__sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF
chunk can hold the ADDIP header and a parameter header, then calls
af->from_addr_param(), which reads the full address (16 bytes for IPv6)
trusting the parameter's declared length.

An unauthenticated peer can send a truncated trailing ASCONF chunk that
declares an IPv6 address parameter but stops after the 4-byte parameter
header; reached from the no-association lookup path, from_addr_param() then
reads uninitialized bytes past the parameter.

Impact: an unauthenticated SCTP peer makes the receive path read up to 16
bytes of uninitialized memory past a truncated ASCONF address parameter.

The sibling __sctp_rcv_init_lookup() bounds parameters with
sctp_walk_params(); this path open-codes the fetch and omits the bound.
Verify the whole address parameter lies within the chunk before
from_addr_param() reads it, the same class of fix as commit 51e5ad549c43
("net: sctp: fix KMSAN uninit-value in sctp_inq_pop").

## CVSS-Vektor

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

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.259
- Kernel ≥ 5.15.210
- Kernel ≥ 6.1.176
- Kernel ≥ 6.6.143
- Kernel ≥ 6.12.94
- Kernel ≥ 6.18.36
- Kernel ≥ 7.0.13

## Referenzen

- <https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16>
- <https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426>
- <https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945>
- <https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46>
- <https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23>
- <https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47df>
- <https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411d>
- <https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319ce>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53225) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_