CVE-2026-43221: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ipmi: ipmb: initialise event handler read bytes IPMB doesn't use i2c reads, but the handler needs to set a value. Otherwise an i2c read will return an uninitialised value from the bus driver.

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CVSS v3.1 Score

5.5

MEDIUM

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

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.02%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-908 CWE-908

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.16 — 6.1.165
linux	linux_kernel	6.2 — 6.6.128
linux	linux_kernel	6.7 — 6.12.75
linux	linux_kernel	6.13 — 6.18.16
linux	linux_kernel	6.19 — 6.19.6
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/102712417bb6aa9a00d852bc59cb0a276db486c4 https://git.kernel.org/stable/c/2dfbc8c17dd161885336e77e71c336cd62cf6748 https://git.kernel.org/stable/c/56d5c0557e53c4d8d92a619fa83eaae178165e07 https://git.kernel.org/stable/c/905554ebd76aeee370bfd5136ea11e0b9d75c6f1 https://git.kernel.org/stable/c/9f235ccecd03c436cb1683eac16b12f119e54aa9 https://git.kernel.org/stable/c/f726b3a57e00bb6249c67714c11ae8b4b31719a1

Frequently Asked Questions

What is CVE-2026-43221? +

In the Linux kernel, the following vulnerability has been resolved: ipmi: ipmb: initialise event handler read bytes IPMB doesn't use i2c reads, but the handler needs to set a value. Otherwise an i2c read will return an uninitialised value from the bus driver. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43221? +

CVE-2026-43221 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-43221? +

CVE-2026-43221 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-43221? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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