CVE-2022-48899

Local kernel use-after-free via GEM handle race

Published Aug 21, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel virtio-GPU GEM handle creation allows local users to trigger a freed object dereference through a handle race. Within drivers/gpu/drm/virtio/virtgpu_ioctl.c, the creation path drops the GEM handle reference before its final object dereference, so a concurrent close can free the object first. Exploitation requires local low-privileged access and a virtio-GPU device; the documented outcome is a freed kernel object dereference, while reliable code execution is not publicly established.

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

Use-after-free in Linux kernel virtio-GPU GEM handle creation allows local users to trigger a freed object dereference through a handle race. Within drivers/gpu/drm/virtio/virtgpu_ioctl.c, the creation path drops the GEM handle reference before its final object dereference, so a concurrent close can free the object first. Exploitation requires local low-privileged access and a virtio-GPU device; the documented outcome is a freed kernel object dereference, while reliable code execution is not publicly established.

The record

CVE
CVE-2022-48899
Published
Aug 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 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=4.4
  2. Affected versionversion=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <011ecdbcd520c90c344b872ca6b4821f7783b2f8
  3. Affected versionversion=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <19ec87d06acfab2313ee82b2a689bf0c154e57ea
  4. Affected versionversion=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <52531258318ed59a2dc5a43df2eaf0eb1d65438e
  5. Affected versionversion=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <68bcd063857075d2f9edfed6024387ac377923e2
  6. Affected versionversion=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <adc48e5e408afbb01d261bd303fd9fbbbaa3e317
  7. Affected versionversion=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <d01d6d2b06c0d8390adf8f3ba08aa60b5642ef73

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.4; version=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <011ecdbcd520c90c344b872ca6b4821f7783b2f8; version=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <19ec87d06acfab2313ee82b2a689bf0c154e57ea; version=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <52531258318ed59a2dc5a43df2eaf0eb1d65438e; version=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <68bcd063857075d2f9edfed6024387ac377923e2; version=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <adc48e5e408afbb01d261bd303fd9fbbbaa3e317; version=62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 <d01d6d2b06c0d8390adf8f3ba08aa60b5642ef73

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.7NIST NVDCVSS:3.1/AV:L/AC:H/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

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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-416Use After Free

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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