CVE-2026-72262

Local kernel corruption via ALSA TLV bounds errors

Published Aug 15, 2026 · Updated Aug 15, 2026

Heap buffer overflow in affected Linux kernels allows local users to corrupt memory and read adjacent heap data through ALSA TLV kcontrols. The bytes_ext_put and bytes_ext_get checks compare payload lengths with the full ipc_control_data allocation even though cdata->data begins after the fixed header; the put restore path also writes through the wrong pointer. Exploitation requires local access to an ALSA sound control device exposing an affected SOF IPC3 bytes_ext control, and it can disclose kernel heap data, corrupt adjacent objects, or crash the system.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Heap buffer overflow in affected Linux kernels allows local users to corrupt memory and read adjacent heap data through ALSA TLV kcontrols. The bytes_ext_put and bytes_ext_get checks compare payload lengths with the full ipc_control_data allocation even though cdata->data begins after the fixed header; the put restore path also writes through the wrong pointer. Exploitation requires local access to an ALSA sound control device exposing an affected SOF IPC3 bytes_ext control, and it can disclose kernel heap data, corrupt adjacent objects, or crash the system.

The record

CVE
CVE-2026-72262
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.18
  2. Affected versionversion=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <121577383b5cf221e86581e0f2bcca4c66f17469
  3. Affected versionversion=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <1adde1941bba7b0d7104b86ed819d48d81cb0ad9
  4. Affected versionversion=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <eaa67e139c9217099e2a7b717aeeb46c65de3494
  5. Affected versionversion=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <f4933e1d11b97b6a0951648b7c3e53850e1b33a9
  6. Affected versionversion=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <fd46668d538993218eea19c6925c868ac0f2630c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <121577383b5cf221e86581e0f2bcca4c66f17469; version=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <1adde1941bba7b0d7104b86ed819d48d81cb0ad9; version=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <eaa67e139c9217099e2a7b717aeeb46c65de3494; version=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <f4933e1d11b97b6a0951648b7c3e53850e1b33a9; version=67ec2a091630c28ea8d05db2bd7178a05b04b7e6 <fd46668d538993218eea19c6925c868ac0f2630c

Published CVSS scores

7.8Linux Kernel CVE TeamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo