CVE-2026-74423

Local denial of service via pinned-page leak

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource leak in the Linux kernel amdxdna component allows local users to exhaust pinned pages through partial user-buffer pinning. In amdxdna_get_ubuf(), a short pin_user_pages_fast() result advances the cleanup count incorrectly, leaving successfully pinned pages unreleased on failure. Reachability requires local access to the amdxdna user-buffer path and a partial page-pin result; repeated failures can destabilize the system.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the Linux kernel amdxdna component allows local users to exhaust pinned pages through partial user-buffer pinning. In amdxdna_get_ubuf(), a short pin_user_pages_fast() result advances the cleanup count incorrectly, leaving successfully pinned pages unreleased on failure. Reachability requires local access to the amdxdna user-buffer path and a partial page-pin result; repeated failures can destabilize the system.

The record

CVE
CVE-2026-74423
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499.001
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=6.18
  2. Affected versionversion=bd72d4acda1069579b35123e3cc0b21ec1193a21 <5b24e0903c58cdfd8ebfecb6ac5c5bacfd06e4e7
  3. Affected versionversion=bd72d4acda1069579b35123e3cc0b21ec1193a21 <68dc52f308a17c3103a349f722dd5dea32c50a88
  4. Affected versionversion=bd72d4acda1069579b35123e3cc0b21ec1193a21 <d946347edc4f0a7b846325323d77e936a4c90d0f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.18; version=bd72d4acda1069579b35123e3cc0b21ec1193a21 <5b24e0903c58cdfd8ebfecb6ac5c5bacfd06e4e7; version=bd72d4acda1069579b35123e3cc0b21ec1193a21 <68dc52f308a17c3103a349f722dd5dea32c50a88; version=bd72d4acda1069579b35123e3cc0b21ec1193a21 <d946347edc4f0a7b846325323d77e936a4c90d0f

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 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

CWE-772Missing Release of Resource after Effective Lifetime
T1499.001OS Exhaustion Flood

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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