CyberSecBulletin
CVE-2026-23187NVD status: Analyzed

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2026-23187 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 7842b5dfcac888ece025a2321257d74b2264b099, 071159ff5c0bf2e5efff79501e23faf3775cbcd1, 4390dcdabb5fca4647bf56a5a6b050bbdfa5760f 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 0.14% 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 7842b5dfcac888ece025a2321257d74b2264b099 or 071159ff5c0bf2e5efff79501e23faf3775cbcd1 or 4390dcdabb5fca4647bf56a5a6b050bbdfa5760f or eb54ce033b344b531b374496e68a2554b2b56b5a, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 6.1.163 or 6.6.124 or 6.12.70 or 6.18.10, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux2684ac05a8c4d2d5c49e6c11eb6206b30a284813 up to, but not including, 7842b5dfcac888ece025a2321257d74b2264b099; 2684ac05a8c4d2d5c49e6c11eb6206b30a284813 up to, but not including, 071159ff5c0bf2e5efff79501e23faf3775cbcd1; 2684ac05a8c4d2d5c49e6c11eb6206b30a284813 up to, but not including, 4390dcdabb5fca4647bf56a5a6b050bbdfa5760f; 2684ac05a8c4d2d5c49e6c11eb6206b30a284813 up to, but not including, eb54ce033b344b531b374496e68a2554b2b56b5a; 2684ac05a8c4d2d5c49e6c11eb6206b30a284813 up to, but not including, 6bd8b4a92a901fae1a422e6f914801063c345e8d; 5.167842b5dfcac888ece025a2321257d74b2264b099, 071159ff5c0bf2e5efff79501e23faf3775cbcd1, 4390dcdabb5fca4647bf56a5a6b050bbdfa5760f, eb54ce033b344b531b374496e68a2554b2b56b5a, 6bd8b4a92a901fae1a422e6f914801063c345e8d
LinuxLinux Kernel5.16 up to, but not including, 6.1.163; 6.2 up to, but not including, 6.6.124; 6.7 up to, but not including, 6.12.70; 6.13 up to, but not including, 6.18.10; 6.196.1.163, 6.6.124, 6.12.70, 6.18.10

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: pmdomain: imx8m-blk-ctrl: fix out-of-range access of bc->domains Fix out-of-range access of bc->domains in imx8m_blk_ctrl_remove().

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. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Out-of-bounds Read vulnerabilities

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