---
title: "CVE-2026-98030: Linux Kernel - Buffer Overflow"
description: "Linux kernel net: dsa: bcm_sf2 contains a buffer overflow caused by bcm_sf2_cfp_rule_get_all() not bounding CFP rule dump by caller's buffer size, letting unprivileged users cause out-of-bounds memory access, exploit requires installed CFP rules by admin."
url: https://panop.io/threat-heartbeat/CVE-2026-98030/
---

# CVE-2026-98030 Linux Kernel - Buffer Overflow

Linux kernel net: dsa: bcm\_sf2 contains a buffer overflow caused by bcm\_sf2\_cfp\_rule\_get\_all() not bounding CFP rule dump by caller's buffer size, letting unprivileged users cause out-of-bounds memory access, exploit requires installed CFP rules by admin.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.12% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98030)

## Details

Type

Buffer Overflow

Impact

Denial Of Service, Information Disclosure

CVSS vector

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

Published

25 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-98030](https://nvd.nist.gov/vuln/detail/CVE-2026-98030)
- [https://git.kernel.org/stable/c/b231b6d8516d3fe0d4bba549908e08d26a4531a5](https://git.kernel.org/stable/c/b231b6d8516d3fe0d4bba549908e08d26a4531a5)
- [https://git.kernel.org/stable/c/cdb719f4b8596d9ccee2d56d204c2c4dce982f46](https://git.kernel.org/stable/c/cdb719f4b8596d9ccee2d56d204c2c4dce982f46)
- [https://git.kernel.org/stable/c/f1a2869b3629c0e8394b77b38cb9f19a018c653c](https://git.kernel.org/stable/c/f1a2869b3629c0e8394b77b38cb9f19a018c653c)
- [https://git.kernel.org/stable/c/fd1a78c16b1f6978c09cf048e15f349732e4c707](https://git.kernel.org/stable/c/fd1a78c16b1f6978c09cf048e15f349732e4c707)
- [https://git.kernel.org/stable/c/8e41ce02589c92356bfd8ef62f6ceff840546e1a](https://git.kernel.org/stable/c/8e41ce02589c92356bfd8ef62f6ceff840546e1a)
- [https://git.kernel.org/stable/c/ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e](https://git.kernel.org/stable/c/ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e)
- [https://git.kernel.org/stable/c/f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4](https://git.kernel.org/stable/c/f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4)
- [https://git.kernel.org/stable/c/f5e93162b3dd195bfda815e8f7a39aaf1d45437b](https://git.kernel.org/stable/c/f5e93162b3dd195bfda815e8f7a39aaf1d45437b)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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