CyberSecBulletin
CVE-2026-64133NVD status: Modified

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2026-64133 is a high-severity out-of-bounds read 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 e060e21fe9cca1e5eafd8a1c597026577771e8d9, 34d0d492a2812b9289af14bca3573a89275965b2, ffa29cea7bf9a4ef2ea8084967f142e0301ac670 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 e060e21fe9cca1e5eafd8a1c597026577771e8d9 or 34d0d492a2812b9289af14bca3573a89275965b2 or ffa29cea7bf9a4ef2ea8084967f142e0301ac670 or 7b6f8c8eb93f02a74b1de8e521c0952af10d1f43, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.10.258 or 5.15.209 or 6.1.175 or 6.6.142, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux719f82d3987aad4cc9f46d19c35f362672545cad up to, but not including, e060e21fe9cca1e5eafd8a1c597026577771e8d9; 719f82d3987aad4cc9f46d19c35f362672545cad up to, but not including, 34d0d492a2812b9289af14bca3573a89275965b2; 719f82d3987aad4cc9f46d19c35f362672545cad up to, but not including, ffa29cea7bf9a4ef2ea8084967f142e0301ac670; 719f82d3987aad4cc9f46d19c35f362672545cad up to, but not including, 7b6f8c8eb93f02a74b1de8e521c0952af10d1f43; 719f82d3987aad4cc9f46d19c35f362672545cad up to, but not including, 8778386e4387b28f2bf8425d7ffc667c6294457f; 719f82d3987aad4cc9f46d19c35f362672545cad up to, but not including, 61c5017c64e2ac9e10b70b14b17a079dbc0a805f; 719f82d3987aad4cc9f46d19c35f362672545cad up to, but not including, 7d107239935793995bdc6cf29bb99e180bde4c28; 719f82d3987aad4cc9f46d19c35f362672545cad up to, but not including, 7b7d6572145c1dab2dd9bfb550b188e5f0ff3c3f; and 1 more rangese060e21fe9cca1e5eafd8a1c597026577771e8d9, 34d0d492a2812b9289af14bca3573a89275965b2, ffa29cea7bf9a4ef2ea8084967f142e0301ac670, 7b6f8c8eb93f02a74b1de8e521c0952af10d1f43, 8778386e4387b28f2bf8425d7ffc667c6294457f, 61c5017c64e2ac9e10b70b14b17a079dbc0a805f
LinuxLinux Kernel2.6.35 up to, but not including, 5.10.258; 5.11 up to, but not including, 5.15.209; 5.16 up to, but not including, 6.1.175; 6.2 up to, but not including, 6.6.142; 6.7 up to, but not including, 6.12.92; 6.13 up to, but not including, 6.18.34; 6.19 up to, but not including, 7.0.11; 7.15.10.258, 5.15.209, 6.1.175, 6.6.142, 6.12.92, 6.18.34

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 CNA.

Official description

In the Linux kernel, the following vulnerability has been resolved: ALSA: asihpi: Fix potential OOB array access at reading cache find_control() to retrieve a cached info accesses the array with the given index blindly, which may lead to an OOB array access. Add a sanity check for avoiding it.

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

References

Recent Out-of-bounds Read vulnerabilities

Spotted an error? Tell us.