---
cve: "CVE-2026-53002"
severity: "CRITICAL"
cvss: 9.8
epss: "35%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-06-24 17:17:11"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T06:49:42+02:00"
---

# CVE-2026-53002

> 9.8 CRITICAL

## Beschreibung

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

netfilter: conntrack: remove sprintf usage

Replace it with scnprintf, the buffer sizes are expected to be large enough
to hold the result, no need for snprintf+overflow check.

Increase buffer size in mangle_content_len() while at it.

BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270
Write of size 1 at addr [..]
 vsnprintf+0xea5/0x1270
 sprintf+0xb1/0xe0
 mangle_content_len+0x1ac/0x280
 nf_nat_sdp_session+0x1cc/0x240
 process_sdp+0x8f8/0xb80
 process_invite_request+0x108/0x2b0
 process_sip_msg+0x5da/0xf50
 sip_help_tcp+0x45e/0x780
 nf_confirm+0x34d/0x990
 [..]

## 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 ≥ 5.10.258
- Kernel ≥ 5.15.209
- Kernel ≥ 6.1.175
- Kernel ≥ 6.6.141
- Kernel ≥ 6.12.91
- Kernel ≥ 6.18.33
- Kernel ≥ 7.0.10

## Referenzen

- <https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956>
- <https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5>
- <https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34>
- <https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e>
- <https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3>
- <https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2>
- <https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45b>
- <https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373d>
- <https://access.redhat.com/errata/RHSA-2026:64770>
- <https://access.redhat.com/errata/RHSA-2026:66000>
- <https://access.redhat.com/errata/RHSA-2026:66180>
- <https://access.redhat.com/security/cve/CVE-2026-53002>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53002) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_