CyberSecBulletin
CVE-2026-43141NVD status: Analyzed

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2026-43141 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions d652ef399f131fcd5f8f34266167449ee7c9e5b3, 5590cd04d6845c01a6bad985a491c58af6fb5389, a11d03d116eef138a7249202bd772c8e61915aec as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.13% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Linux to d652ef399f131fcd5f8f34266167449ee7c9e5b3 or 5590cd04d6845c01a6bad985a491c58af6fb5389 or a11d03d116eef138a7249202bd772c8e61915aec or d0559d07afabfddaaded6a61a16154486b956764, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.10.252 or 5.15.202 or 6.1.165 or 6.6.128, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, d652ef399f131fcd5f8f34266167449ee7c9e5b3; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, 5590cd04d6845c01a6bad985a491c58af6fb5389; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, a11d03d116eef138a7249202bd772c8e61915aec; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, d0559d07afabfddaaded6a61a16154486b956764; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, 2e4d5e8d86a969318340be95470bb76e52392082; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, a133e3caf844a3f56b6eef89ddaa66115874f6bd; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, 1a867d0d79a4a570a33f2f433919ad2bd7a27b67; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, 186615f8855a0be4ee7d3fcd09a8ecc10e783b08; and 1 more rangesd652ef399f131fcd5f8f34266167449ee7c9e5b3, 5590cd04d6845c01a6bad985a491c58af6fb5389, a11d03d116eef138a7249202bd772c8e61915aec, d0559d07afabfddaaded6a61a16154486b956764, 2e4d5e8d86a969318340be95470bb76e52392082, a133e3caf844a3f56b6eef89ddaa66115874f6bd
LinuxLinux Kernel4.15 up to, but not including, 5.10.252; 5.11 up to, but not including, 5.15.202; 5.16 up to, but not including, 6.1.165; 6.2 up to, but not including, 6.6.128; 6.7 up to, but not including, 6.12.75; 6.13 up to, but not including, 6.18.16; 6.19 up to, but not including, 6.19.65.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.

Official 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.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

How developers prevent this class of flaw

  • Use a language that provides appropriate memory abstractions.

More Out-of-bounds Read vulnerabilities (CWE-125)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Recent Out-of-bounds Read vulnerabilities

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