CyberSecBulletin
CVE-2026-53387NVD status: Analyzed

Linux: Improper Validation of Array Index

Published Updated By the CyberSecBulletin desk

CVE-2026-53387 is a high-severity improper validation of array index 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 df9127a1d2d748e426c49c8fcd9b6801e4eb743d, 0a89002737ee34decc20fa232204dbe5fe83e0de, f75beebcd5bc9bdc80e0722142e78a6f306214ee 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 df9127a1d2d748e426c49c8fcd9b6801e4eb743d or 0a89002737ee34decc20fa232204dbe5fe83e0de or f75beebcd5bc9bdc80e0722142e78a6f306214ee or e545936e06f1c7173ab41a5f33a77ff43ced3a8d, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 6.12.95 or 6.18.37 or 7.0.14 or 7.1.2, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux3b82f43238aecd73464aeacc9c73407079511533 up to, but not including, df9127a1d2d748e426c49c8fcd9b6801e4eb743d; 3b82f43238aecd73464aeacc9c73407079511533 up to, but not including, 0a89002737ee34decc20fa232204dbe5fe83e0de; 3b82f43238aecd73464aeacc9c73407079511533 up to, but not including, f75beebcd5bc9bdc80e0722142e78a6f306214ee; 3b82f43238aecd73464aeacc9c73407079511533 up to, but not including, e545936e06f1c7173ab41a5f33a77ff43ced3a8d; 3b82f43238aecd73464aeacc9c73407079511533 up to, but not including, 307dc4240bd41852d9e0912921e298160db1c109; 6.8df9127a1d2d748e426c49c8fcd9b6801e4eb743d, 0a89002737ee34decc20fa232204dbe5fe83e0de, f75beebcd5bc9bdc80e0722142e78a6f306214ee, e545936e06f1c7173ab41a5f33a77ff43ced3a8d, 307dc4240bd41852d9e0912921e298160db1c109
LinuxLinux Kernel6.8 up to, but not including, 6.12.95; 6.13 up to, but not including, 6.18.37; 6.19 up to, but not including, 7.0.14; 7.1 up to, but not including, 7.1.26.12.95, 6.18.37, 7.0.14, 7.1.2

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 CNA.

Official description

In the Linux kernel, the following vulnerability has been resolved: iio: light: veml6075: add bounds check to veml6075_it_ms index veml6075_it_ms has 5 elements but VEML6075_CONF_IT can yield values 0-7. If it returns a value >= 5, this causes an out-of-bounds array access. Add a bounds check and return -EINVAL if the index is out of range. The problem values are reserved so should never be read from the register. Hence this is hardening against fault device, missprogramming or bus corruption.

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. Record last changed materially (score, affected products, status or references).

References

Recent Improper Validation of Array Index vulnerabilities

Spotted an error? Tell us.