---
cve: "CVE-2026-98030"
severity: "HIGH"
cvss: 7.0
epss: "0.1%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-25 11:17:31"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-10T13:03:13+02:00"
---

# CVE-2026-98030

> 7.0 HIGH

## Beschreibung

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

net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size

bcm_sf2_cfp_rule_get_all() walks the whole cfp.unique bitmap into
rule_locs[] without consulting nfc->rule_cnt, which is how many entries
the caller had room for.  ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN
and the ioctl sizes the buffer from the rule_cnt userspace passes in, so
once an admin has installed CFP rules any user can ask for fewer slots
than there are rules and run off the end of the allocation.  A rule_cnt
of 0 leaves the buffer pointer NULL and the walk dereferences it.

## CNA-Record (Kanon, cvelistV5)

- CNA: **Linux**
- State: PUBLISHED
- Stand: 2026-10-03 11:01:47
- CNA-CVSS: **7.0** (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.271
- Kernel ≥ 5.15.222
- Kernel ≥ 6.1.189
- Kernel ≥ 6.6.158
- Kernel ≥ 6.12.111
- Kernel ≥ 6.18.53
- Kernel ≥ 7.2.7

## BSI-Hinweise (deutsch)

- [Linux Kernel: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3579) — _BSI-Einstufung: mittel_
  Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Zustand herbeizuführen oder nicht näher spezifizierten Angriff durchzuführen.

## Referenzen

- <https://git.kernel.org/stable/c/ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e>
- <https://git.kernel.org/stable/c/8e41ce02589c92356bfd8ef62f6ceff840546e1a>
- <https://git.kernel.org/stable/c/f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4>
- <https://git.kernel.org/stable/c/f5e93162b3dd195bfda815e8f7a39aaf1d45437b>
- <https://git.kernel.org/stable/c/f1a2869b3629c0e8394b77b38cb9f19a018c653c>
- <https://git.kernel.org/stable/c/fd1a78c16b1f6978c09cf048e15f349732e4c707>
- <https://git.kernel.org/stable/c/b231b6d8516d3fe0d4bba549908e08d26a4531a5>
- <https://git.kernel.org/stable/c/cdb719f4b8596d9ccee2d56d204c2c4dce982f46>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-98030/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_