---
title: "CVE-2026-93125: Linux Kernel - Integer Overflow"
description: "Linux kernel contains an integer overflow vulnerability in BPF kfunc argument handling where rdonly_buf_size or rdwr_buf_size exceeding u32 max are not properly rejected, letting attackers cause incorrect memory size validation, exploit requires use of specific kfunc arguments."
url: https://panop.io/threat-heartbeat/CVE-2026-93125/
---

# CVE-2026-93125 Linux Kernel - Integer Overflow

Linux kernel contains an integer overflow vulnerability in BPF kfunc argument handling where rdonly\_buf\_size or rdwr\_buf\_size exceeding u32 max are not properly rejected, letting attackers cause incorrect memory size validation, exploit requires use of specific kfunc arguments.

CVSS base score 7.8 /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-2026-93125)

## Details

Type

Integer Overflow

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix that rejects rdonly\_buf\_size/rdwr\_buf\_size values exceeding U32\_MAX.

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-2026-93125](https://nvd.nist.gov/vuln/detail/CVE-2026-93125)
- [https://git.kernel.org/stable/c/56a3846830ac95a472297d0cbba75cbff29540bb](https://git.kernel.org/stable/c/56a3846830ac95a472297d0cbba75cbff29540bb)
- [https://git.kernel.org/stable/c/93a20b14f8627b2d3486e3ec1d3f2e7275a506ec](https://git.kernel.org/stable/c/93a20b14f8627b2d3486e3ec1d3f2e7275a506ec)
- [https://git.kernel.org/stable/c/2aaf67f0516fde29620d0edfc29c01b9ea7ad430](https://git.kernel.org/stable/c/2aaf67f0516fde29620d0edfc29c01b9ea7ad430)

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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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