CyberSecBulletin
CVE-2026-43241NVD status: Analyzed

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2026-43241 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 348e1ac9ad983ed7e62de14e1daf47f1695a4ce9, ee02c4f980c91820845dd8e469ec7dc670ab6d9d, 740945de896021b9a859e71f38f6aea72a6393cf 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 348e1ac9ad983ed7e62de14e1daf47f1695a4ce9 or ee02c4f980c91820845dd8e469ec7dc670ab6d9d or 740945de896021b9a859e71f38f6aea72a6393cf or 85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92, 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, 348e1ac9ad983ed7e62de14e1daf47f1695a4ce9; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, ee02c4f980c91820845dd8e469ec7dc670ab6d9d; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, 740945de896021b9a859e71f38f6aea72a6393cf; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, 85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, 0e930420945106151c6eb3d7837b4e6154e9b144; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, 2346856b74823a2a78109002e479a3d02526a9ce; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, 47ce292dd45dc689747c40603222691638919189; ec0467ccbdeb69a86c8729073057bda7bce00eec up to, but not including, c8ba7ad2cc1c7b90570aa347b8ebbe279f1eface; and 1 more ranges348e1ac9ad983ed7e62de14e1daf47f1695a4ce9, ee02c4f980c91820845dd8e469ec7dc670ab6d9d, 740945de896021b9a859e71f38f6aea72a6393cf, 85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92, 0e930420945106151c6eb3d7837b4e6154e9b144, 2346856b74823a2a78109002e479a3d02526a9ce
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 array-index-out-of-bounds access Number of MW LUTs depends on NTB configuration and can be set to MAX_MWS, This patch protects against invalid index out of bounds access to mw_sizes When invalid access print message to user that configuration is not valid.

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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