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CVE Record

CVE-2022-48899: drm/virtio: Fix GEM handle creation UAF

In the Linux kernel, the following vulnerability has been resolved: drm/virtio: Fix GEM handle creation UAF Userspace can guess the handle value and try to race GEM object creation with handle close, resulting in a use-after-free if we dereference the object after dropping the handle's reference. For that reason, dropping the handle's reference must be done *after* we are done dereferencing the object.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-48899 is a Linux kernel flaw in the virtio DRM graphics driver. A local userspace process may race graphics object handle creation and closure, causing a use-after-free. This is not listed in CISA KEV, and the provided sources do not show active exploitation or a CVSS score.

Executive priority

Prioritize patching for multi-user Linux systems and virtualized desktop or workload environments using virtio graphics. Treat as routine-to-accelerated kernel maintenance unless your environment exposes virtio DRM to untrusted local users.

Technical view

The issue is in drm/virtio GEM handle creation. Userspace can guess a handle value and race GEM object creation with handle close. The kernel could dereference an object after dropping the handle reference, creating a use-after-free. Kernel stable commits change reference handling so dereferencing completes before the reference is dropped.

Likely exposure

Exposure is most likely on Linux systems running affected kernels with virtio DRM graphics available to local userspace, such as virtualized environments using virtio GPU. The source bundle lists Linux kernel versions and stable commits, but does not provide distribution-specific package names.

Exploitation context

The described attack path requires local userspace interaction with the virtio DRM/GEM interface and a race condition. No cited source indicates remote exploitation, public weaponization, or active exploitation. Impact is not fully characterized in the provided sources.

Researcher notes

Evidence is limited to the CVE record and Linux stable commit references. No CVSS, CWE, proof of exploit, or distribution mapping is provided. Avoid assuming broader driver impact beyond drm/virtio unless confirmed by vendor advisories or code review.

Mitigation direction

  • Update to a kernel version containing the referenced stable fix commits.
  • Follow your Linux distribution’s advisory for patched kernel packages.
  • Reduce untrusted local access to affected virtio DRM devices where operationally feasible.

Validation and detection

  • Inventory Linux hosts and virtual machines using virtio DRM or virtio GPU.
  • Compare running kernel builds against vendor advisories and the referenced stable commits.
  • Confirm patched kernels are installed and active after reboot.
Prepared
Confidence
medium
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2022-48899 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
1ADP providers
7Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257, 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257, 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257, 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257, 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257, 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257unaffected
LinuxLinux4.4, 0, 4.19.270, 5.4.229, 5.10.164, 5.15.89, 6.1.7, 6.2affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.