LiveActive security incident?Get immediate response
CVE Record

CVE-2022-48887: drm/vmwgfx: Remove rcu locks from user resources

In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Remove rcu locks from user resources User resource lookups used rcu to avoid two extra atomics. Unfortunately the rcu paths were buggy and it was easy to make the driver crash by submitting command buffers from two different threads. Because the lookups never show up in performance profiles replace them with a regular spin lock which fixes the races in accesses to those shared resources. Fixes kernel oops'es in IGT's vmwgfx execution_buffer stress test and seen crashes with apps using shared resources.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can crash systems using the vmwgfx graphics driver when shared graphics resources are accessed concurrently. The source describes kernel oopses during stress testing and crashes in applications using shared resources. Public data does not provide CVSS, CWE, confirmed exploitation, or a broader impact claim.

Executive priority

Treat this as an availability risk for affected Linux virtual graphics environments. Prioritize normal kernel patching, with faster action where vmwgfx crashes would affect production reliability. There is no source-backed evidence of active exploitation.

Technical view

The vmwgfx DRM driver used RCU-protected user resource lookups. The RCU paths were race-prone when command buffers were submitted from two threads, causing crashes. The upstream resolution replaces those lookups with a regular spin lock because the optimization was not performance-critical.

Likely exposure

Exposure is limited to Linux systems running affected kernel builds with the drm/vmwgfx driver in use. The bundle lists Linux kernel affected version markers including 4.20, 6.1.7, and 6.2, but downstream package mapping is not provided.

Exploitation context

The sources mention reproducible crashes in IGT's vmwgfx execution_buffer stress test and crashes from applications using shared resources. There is no KEV listing and no cited evidence of active exploitation in the provided bundle.

Researcher notes

The vulnerability is a concurrency race in vmwgfx user resource lookup paths. The source only supports crash/oops impact, not privilege escalation or data exposure. Affected-version precision depends on downstream kernel backports, so validate against vendor kernel metadata.

Mitigation direction

  • Apply kernel updates containing the referenced stable fixes.
  • Check Linux distribution advisories for exact package versions and backports.
  • Prioritize systems where vmwgfx is loaded or virtual graphics is used.
  • If patch timing is unclear, seek vendor guidance for supported mitigations.

Validation and detection

  • Inventory kernel versions and whether drm/vmwgfx is loaded.
  • Map installed kernel packages to distribution advisories or fixed commits.
  • Review crash logs for vmwgfx-related kernel oops entries.
  • Confirm updated kernels include the referenced stable commits.
Prepared
Confidence
medium
Sources
4

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2022-48887 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
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
3Source 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
LinuxLinuxe14c02e6b6990e9f6ee18a214a22ac26bae1b25e, e14c02e6b6990e9f6ee18a214a22ac26bae1b25eunaffected
LinuxLinux4.20, 0, 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.