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Vulnerability record · CVE-2026-43141 · published 6 May 2026

CVE-2026-43141: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut Number of MW LUTs depends on NTB configuration and can be set to zero, in such scenario rounddown_pow_of_two will cause undefined behaviour and should not be performed. This patch ensures that rounddown_pow_of_two is called on valid value.

7.1 CVSS 3.1 High EPSS 0.17% · top 94.7% CWE-125 · Out-of-bounds read
7.1CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut Number of MW LUTs depends on NTB configuration and can be set to zero, in such scenario rounddown_pow_of_two will cause undefined behaviour and should not be performed. This patch ensures that rounddown_pow_of_two is called on valid value.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/186615f8855a0be4ee7d3fcd09a8ecc10e783b08 Patch
https://git.kernel.org/stable/c/1a867d0d79a4a570a33f2f433919ad2bd7a27b67 Patch
https://git.kernel.org/stable/c/2e4d5e8d86a969318340be95470bb76e52392082 Patch
https://git.kernel.org/stable/c/5590cd04d6845c01a6bad985a491c58af6fb5389 Patch
https://git.kernel.org/stable/c/a11d03d116eef138a7249202bd772c8e61915aec Patch
https://git.kernel.org/stable/c/a133e3caf844a3f56b6eef89ddaa66115874f6bd Patch
https://git.kernel.org/stable/c/d0559d07afabfddaaded6a61a16154486b956764 Patch
https://git.kernel.org/stable/c/d652ef399f131fcd5f8f34266167449ee7c9e5b3 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-43141), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.