CyberSecBulletin
CVE-2026-64272NVD status: Modified

Linux: Improper Validation of Array Index

Published Updated By the CyberSecBulletin desk

CVE-2026-64272 is a high-severity improper validation of array index vulnerability in Linux, with a CVSS 3.1 base score of 7.8 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 062bbe55a1f6d77b89d07135ba3b09f97bfac1cb, 38de2979d90d8cd94f18e0567be4c8342d0e0410, 112666835071d935fef764aab590339e97216d4a 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 0.17% 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 062bbe55a1f6d77b89d07135ba3b09f97bfac1cb or 38de2979d90d8cd94f18e0567be4c8342d0e0410 or 112666835071d935fef764aab590339e97216d4a or 7c00a0787af7164438bdbc97fcae9733cfc58d21, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 6.6.145 or 6.12.96 or 6.18.39 or 7.1.4, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux53fefdd1d3a3403d8c44e28898d1031d8763b913 up to, but not including, 062bbe55a1f6d77b89d07135ba3b09f97bfac1cb; 53fefdd1d3a3403d8c44e28898d1031d8763b913 up to, but not including, 38de2979d90d8cd94f18e0567be4c8342d0e0410; 53fefdd1d3a3403d8c44e28898d1031d8763b913 up to, but not including, 112666835071d935fef764aab590339e97216d4a; 53fefdd1d3a3403d8c44e28898d1031d8763b913 up to, but not including, 7c00a0787af7164438bdbc97fcae9733cfc58d21; 53fefdd1d3a3403d8c44e28898d1031d8763b913 up to, but not including, 75b12874b4172533b9efc349db328cb1a59c3981; 53fefdd1d3a3403d8c44e28898d1031d8763b913 up to, but not including, a747c4eb02656afdbd92eea83b88e92715a23977; 53fefdd1d3a3403d8c44e28898d1031d8763b913 up to, but not including, a6ac4e24c1a8a533bb61035184fdcc7eede4cc8d; 5.13062bbe55a1f6d77b89d07135ba3b09f97bfac1cb, 38de2979d90d8cd94f18e0567be4c8342d0e0410, 112666835071d935fef764aab590339e97216d4a, 7c00a0787af7164438bdbc97fcae9733cfc58d21, 75b12874b4172533b9efc349db328cb1a59c3981, a747c4eb02656afdbd92eea83b88e92715a23977
LinuxLinux Kernel5.13 up to, but not including, 6.6.145; 6.7 up to, but not including, 6.12.96; 6.13 up to, but not including, 6.18.39; 6.19 up to, but not including, 7.1.46.6.145, 6.12.96, 6.18.39, 7.1.4

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
HighData or code can be modified at will.
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:H/A:H. Scored by NVD.

Official description

In the Linux kernel, the following vulnerability has been resolved: Input: mms114 - fix touch indexing for MMS134S and MMS136 The MMS134S and MMS136 touch controllers have an event size of 6 bytes rather than 8 bytes. When __mms114_read_reg() reads the touch data packet from the device into the touch buffer, the events are packed tightly at 6-byte intervals. However, the driver iterates through the events using standard C array indexing (touch[index]), where each element is sizeof(struct mms114_touch) (8 bytes) apart. As a result, any touch events beyond the first one are read from incorrect offsets and parsed improperly. Fix this by explicitly calculating the byte offset for each touch event based on the device's specific event size.

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

The underlying weakness: Improper Validation of Array Index

The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

How developers prevent this class of flaw

  • Use an input validation framework such as Struts or the OWASP ESAPI Validation API. Note that using a framework does not automatically address all input validation problems; be mindful of weaknesses that could arise from misusing the framework itself (CWE-1173).
  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, Ada allows the programmer to constrain the values of a variable and languages such as Java and Ruby will allow the programmer to handle exceptions when an out-of-bounds index is accessed.
  • Use a CPU and operating system that offers Data Execution Protection (using hardware NX or XD bits) or the equivalent techniques that simulate this feature in software, such as PaX. These techniques ensure that any instruction executed is exclusively at a memory address that is part of the code segment. For more information on these techniques see D3-PSEP (Process Segment Execution Prevention) from D3FEND.

More Improper Validation of Array Index vulnerabilities (CWE-129)

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 Improper Validation of Array Index vulnerabilities

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