CyberSecBulletin
CVE-2026-64237NVD status: Analyzed

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2026-64237 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 47b52b98edfe34d0249e72f815215ef24311c3a3, c2c3b33b3c0bf2c9427c0926817ef5ffac50de6f, 331d49b4e1c9efe4479bbd22922dfcdd8c64be7b 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 0.12% 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 47b52b98edfe34d0249e72f815215ef24311c3a3 or c2c3b33b3c0bf2c9427c0926817ef5ffac50de6f or 331d49b4e1c9efe4479bbd22922dfcdd8c64be7b or 48b0aa9c08a3ac8e0c0345b7ca581f552324e460, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.10.259 or 5.15.210 or 6.1.176 or 6.6.143, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxbb03bf3f8427a38112819061fc8688999ba02f67 up to, but not including, 47b52b98edfe34d0249e72f815215ef24311c3a3; bb03bf3f8427a38112819061fc8688999ba02f67 up to, but not including, c2c3b33b3c0bf2c9427c0926817ef5ffac50de6f; bb03bf3f8427a38112819061fc8688999ba02f67 up to, but not including, 331d49b4e1c9efe4479bbd22922dfcdd8c64be7b; bb03bf3f8427a38112819061fc8688999ba02f67 up to, but not including, 48b0aa9c08a3ac8e0c0345b7ca581f552324e460; bb03bf3f8427a38112819061fc8688999ba02f67 up to, but not including, 3b37190ad3ded3a15fb1dbfc4f26df520a3e59bb; bb03bf3f8427a38112819061fc8688999ba02f67 up to, but not including, bf769358419e00344c1b16fa034d058f563d46a1; bb03bf3f8427a38112819061fc8688999ba02f67 up to, but not including, d97baee9590edf303b3eca432e61de9320834fe1; bb03bf3f8427a38112819061fc8688999ba02f67 up to, but not including, 76b0d0baa9ae9c60e726bbe1b6ff0bec2c993634; and 1 more ranges47b52b98edfe34d0249e72f815215ef24311c3a3, c2c3b33b3c0bf2c9427c0926817ef5ffac50de6f, 331d49b4e1c9efe4479bbd22922dfcdd8c64be7b, 48b0aa9c08a3ac8e0c0345b7ca581f552324e460, 3b37190ad3ded3a15fb1dbfc4f26df520a3e59bb, bf769358419e00344c1b16fa034d058f563d46a1
LinuxLinux Kernel4.0 up to, but not including, 5.10.259; 5.11 up to, but not including, 5.15.210; 5.16 up to, but not including, 6.1.176; 6.2 up to, but not including, 6.6.143; 6.7 up to, but not including, 6.12.93; 6.13 up to, but not including, 6.18.35; 6.19 up to, but not including, 7.0.12; 7.15.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35

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: Input: elan_i2c - validate firmware size before use Ensure that the firmware file is large enough to contain the expected number of pages and the signature (which resides at the end of the firmware blob) before accessing them to prevent potential out-of-bounds reads.

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

Spotted an error? Tell us.