# CVE-2026-81007

## Summary

- **CVE ID:** CVE-2026-81007
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 14, 2026

## Description

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

ipmi: ipmb: validate write message length

ipmb_write() read message fields before validating the length byte.

A zero or short write can read uninitialized stack bytes.

A length smaller than the SMBus header underflows the block write length.

Require a non-empty buffer and the minimum IPMB request length.

Also require the length byte plus payload before parsing the message.

## Affected Products

- Linux — Linux (51bd6f291583684f495ea498984dfc22049d7fd2)
- Linux — Linux (5.3)
- Linux — Linux (0)
- Linux — Linux (6.12.109)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)
- Linux — Linux (5.10.270)
- Linux — Linux (5.15.221)
- Linux — Linux (6.1.188)
- Linux — Linux (6.6.157)

## References

- [CNA](https://git.kernel.org/stable/c/60939bcda6f3f104ef456fdbf3cc5733c0720fb1)
- [CNA](https://git.kernel.org/stable/c/5719431ca2b5fa26560bb38f6202f8b97fa3bbb0)
- [CNA](https://git.kernel.org/stable/c/a84c6e3d188f2c6e674910929eb790634299d6d5)
- [CNA](https://git.kernel.org/stable/c/53637506884dbd5c91a89b1a3547d99d80f8ed2c)
- [CNA](https://git.kernel.org/stable/c/8990c7f6bfc1e7689b7012a7d4d0efb9f07a9c89)
- [CNA](https://git.kernel.org/stable/c/94f8d20153e348c79bc14dc25f873470518892da)
- [CNA](https://git.kernel.org/stable/c/e527cd4e80066e1ed070fdc7c705bde340cdcc62)
- [CNA](https://git.kernel.org/stable/c/7d66d54b974cff0a959e188af844d2d110422767)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.13%
- **EPSS Percentile:** 2.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._