CVE-2024-44943

SEV virtual-machine launch failure via GUP folio misuse

Published Aug 28, 2024 · Updated May 11, 2026

Improper page pinning in Linux 6.6 causes SEV virtual-machine launch failure and a kernel warning when CMA-backed memory is used. In the slow GUP fallback, try_grab_folio applies a fast-path long-term pin check despite a stable page reference, rejecting CMA pages before migration. The condition requires an AMD SEV guest launch that long-term-pins CMA-backed memory; no data-integrity or confidentiality impact is reported.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper page pinning in Linux 6.6 causes SEV virtual-machine launch failure and a kernel warning when CMA-backed memory is used. In the slow GUP fallback, try_grab_folio applies a fast-path long-term pin check despite a stable page reference, rejecting CMA pages before migration. The condition requires an AMD SEV guest launch that long-term-pins CMA-backed memory; no data-integrity or confidentiality impact is reported.

The record

CVE
CVE-2024-44943
Published
Aug 28, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=57edfcfd3419b4799353d8cbd6ce49da075cfdbd <26273f5f4cf68b29414e403837093408a9c98e1f
  2. Affected versionversion=57edfcfd3419b4799353d8cbd6ce49da075cfdbd <f442fa6141379a20b48ae3efabee827a3d260787
  3. Affected versionversion=6.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=57edfcfd3419b4799353d8cbd6ce49da075cfdbd <26273f5f4cf68b29414e403837093408a9c98e1f; version=57edfcfd3419b4799353d8cbd6ce49da075cfdbd <f442fa6141379a20b48ae3efabee827a3d260787; version=6.6

Published CVSS scores

No CVSS assessment is available in this record.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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