CVE-2024-27400

Incorrect buffer tracking via misordered move notifications

Published May 13, 2024 · Updated Aug 5, 2026

Incorrect state handling in affected Linux kernel releases allows local users to disrupt AMDGPU buffer-move tracking. In amdgpu_ttm_move(), notification occurs after the buffer move, when the old location is unavailable, misordering DMA-buf and virtual-memory notifications and updating eviction statistics too early. Exploitation requires low-privilege local access and an AMDGPU path that moves a buffer object; the exact security consequence is not publicly documented.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect state handling in affected Linux kernel releases allows local users to disrupt AMDGPU buffer-move tracking. In amdgpu_ttm_move(), notification occurs after the buffer move, when the old location is unavailable, misordering DMA-buf and virtual-memory notifications and updating eviction statistics too early. Exploitation requires low-privilege local access and an AMDGPU path that moves a buffer object; the exact security consequence is not publicly documented.

The record

CVE
CVE-2024-27400
Published
May 13, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=1cd2b612474c07b17a21e27f2eed8dff75cb5057
  2. Affected versionversion=5.15.149 <5.16
  3. Affected versionversion=6.1.77 <6.1.91
  4. Affected versionversion=6.6.16 <6.6.31
  5. Affected versionversion=6.7.4 <6.8
  6. Affected versionversion=6.8
  7. Affected versionversion=77bcd4ab446fa35ad135b1c7404415ed9a129296
  8. Affected versionversion=94aeb4117343d072e3a35b9595bcbfc0058ee724 <9a4f6e138720b6e9adf7b82a71d0292f3f276480
  9. Affected versionversion=94aeb4117343d072e3a35b9595bcbfc0058ee724 <d3a9331a6591e9df64791e076f6591f440af51c3
  10. Affected versionversion=d443fb67ca5ab04760449d21ddea66f6728e5b00 <5c25b169f9a0b34ee410891a96bc9d7b9ed6f9be
  11. Affected versionversion=e7a0ee45c653784edda5e36bae6ae3c75fd5e7a8 <0c7ed3ed35eec9138b88d42217b5a6b9a62bda4d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1cd2b612474c07b17a21e27f2eed8dff75cb5057; version=5.15.149 <5.16; version=6.1.77 <6.1.91; version=6.6.16 <6.6.31; version=6.7.4 <6.8; version=6.8; version=77bcd4ab446fa35ad135b1c7404415ed9a129296; version=94aeb4117343d072e3a35b9595bcbfc0058ee724 <9a4f6e138720b6e9adf7b82a71d0292f3f276480; version=94aeb4117343d072e3a35b9595bcbfc0058ee724 <d3a9331a6591e9df64791e076f6591f440af51c3; version=d443fb67ca5ab04760449d21ddea66f6728e5b00 <5c25b169f9a0b34ee410891a96bc9d7b9ed6f9be; version=e7a0ee45c653784edda5e36bae6ae3c75fd5e7a8 <0c7ed3ed35eec9138b88d42217b5a6b9a62bda4d

Published CVSS scores

7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS: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.

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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

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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