---
title: "CVE-2026-93287: Linux Kernel - Buffer Overflow"
description: "Linux kernel contains a buffer overflow vulnerability caused by lack of early validation of oversized SMBus block transfers in __i2c_smbus_xfer, letting local attackers cause out-of-bounds memory access, exploit requires crafted SMBus block transfer requests."
url: https://panop.io/threat-heartbeat/CVE-2026-93287/
---

# CVE-2026-93287 Linux Kernel - Buffer Overflow

Linux kernel contains a buffer overflow vulnerability caused by lack of early validation of oversized SMBus block transfers in \_\_i2c\_smbus\_xfer, letting local attackers cause out-of-bounds memory access, exploit requires crafted SMBus block transfer requests.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.13% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93287)

## Details

Type

Buffer Overflow

Impact

Denial Of Service, Remote Code Execution

CVSS vector

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

Published

24 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for SMBus block transfer validation.

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-2026-93287](https://nvd.nist.gov/vuln/detail/CVE-2026-93287)
- [https://git.kernel.org/stable/c/856dffcc097b3d8ed45a643ebda07cb92968cb33](https://git.kernel.org/stable/c/856dffcc097b3d8ed45a643ebda07cb92968cb33)
- [https://git.kernel.org/stable/c/df077253f6405d67ad087538e495ef32a05717b7](https://git.kernel.org/stable/c/df077253f6405d67ad087538e495ef32a05717b7)
- [https://git.kernel.org/stable/c/3051cd060fa496df42954291fa2306ed2eab4ecc](https://git.kernel.org/stable/c/3051cd060fa496df42954291fa2306ed2eab4ecc)
- [https://git.kernel.org/stable/c/c4b478bc50b7ca9865e237909941253a0f7111a2](https://git.kernel.org/stable/c/c4b478bc50b7ca9865e237909941253a0f7111a2)
- [https://git.kernel.org/stable/c/f09edffba97d37b1fdff5f818a9a45f8a98ac171](https://git.kernel.org/stable/c/f09edffba97d37b1fdff5f818a9a45f8a98ac171)
- [https://git.kernel.org/stable/c/356875e33f2c6d2061a02c9dec1a1e639d265a55](https://git.kernel.org/stable/c/356875e33f2c6d2061a02c9dec1a1e639d265a55)
- [https://git.kernel.org/stable/c/72ca5e0b8b7a62615758f8871c34d61616c2dc8b](https://git.kernel.org/stable/c/72ca5e0b8b7a62615758f8871c34d61616c2dc8b)

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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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