CVE-2026-53203

Kernel memory disclosure via unchecked firmware length

Published Jun 25, 2026 · Updated Jun 25, 2026

Buffer overflow in the Linux Kernel ivpu metric streamer allows local users to disclose kernel memory or interrupt service. ivpu_ms_get_info_ioctl copies a firmware-reported length from a fixed 64 KiB buffer to user space without checking the allocation size. Access to an Intel VPU accelerator device node is required; an oversized response reads beyond the allocation and interrupts the host.

CVSS severity7.1
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the Linux Kernel ivpu metric streamer allows local users to disclose kernel memory or interrupt service. ivpu_ms_get_info_ioctl copies a firmware-reported length from a fixed 64 KiB buffer to user space without checking the allocation size. Access to an Intel VPU accelerator device node is required; an oversized response reads beyond the allocation and interrupts the host.

The record

CVE
CVE-2026-53203
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, CWE-120, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=6.11
  2. Affected versionversion=cdfad4db7756563db7d458216d9e3c2651dddc7d <4e5047cc94bea1cc7b670b7f503358e9af0542df
  3. Affected versionversion=cdfad4db7756563db7d458216d9e3c2651dddc7d <d3c12ed33e8923f3090909a1738f3e59292996a6
  4. Affected versionversion=cdfad4db7756563db7d458216d9e3c2651dddc7d <fa598556ecef412edcb391f144b7642e18fdfd45
  5. Affected versionversion=cdfad4db7756563db7d458216d9e3c2651dddc7d <fb176425837693f50c5c9fc8db6fbb04af22bd0a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.11; version=cdfad4db7756563db7d458216d9e3c2651dddc7d <4e5047cc94bea1cc7b670b7f503358e9af0542df; version=cdfad4db7756563db7d458216d9e3c2651dddc7d <d3c12ed33e8923f3090909a1738f3e59292996a6; version=cdfad4db7756563db7d458216d9e3c2651dddc7d <fa598556ecef412edcb391f144b7642e18fdfd45; version=cdfad4db7756563db7d458216d9e3c2651dddc7d <fb176425837693f50c5c9fc8db6fbb04af22bd0a

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1005Data from Local System

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

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Your stack

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