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CVE Record

CVE-2022-49982: media: pvrusb2: fix memory leak in pvr_probe

In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix memory leak in pvr_probe The error handling code in pvr2_hdw_create forgets to unregister the v4l2 device. When pvr2_hdw_create returns back to pvr2_context_create, it calls pvr2_context_destroy to destroy context, but mp->hdw is NULL, which leads to that pvr2_hdw_destroy directly returns. Fix this by adding v4l2_device_unregister to decrease the refcount of usb interface.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue is a memory leak in the pvrusb2 media USB driver during device probing error handling. The provided sources do not show remote exploitation, active exploitation, CVSS scoring, or business-impact detail. Treat it as a kernel maintenance item for systems that may load this driver.

Executive priority

Handle through normal kernel patch management unless pvrusb2 is used on sensitive or highly available Linux systems. There is no source evidence of active exploitation or severe impact, but stale kernels should still be remediated.

Technical view

pvr2_hdw_create failed to unregister the v4l2 device on an error path. pvr2_context_destroy then returned early because mp->hdw was NULL, leaving the v4l2 device reference unreleased. Kernel stable commits add v4l2_device_unregister to reduce the USB interface reference count.

Likely exposure

Exposure appears limited to Linux systems with affected kernel versions where the pvrusb2 media USB driver can be loaded or used. The bundle lists Linux kernel versions from 2.6.30 through 6.0 as affected, with stable commit references for fixes.

Exploitation context

The supplied sources do not identify active exploitation, public exploit code, remote attack paths, required privileges, or practical impact beyond a memory leak. CISA KEV status is false in the bundle, so active exploitation should not be assumed.

Researcher notes

The record lacks CVSS, CWE, exploitability details, and distribution-specific package mapping. Analysis should focus on affected kernel lineage, pvrusb2 driver reachability, and whether vendor kernels have backported the v4l2_device_unregister fix.

Mitigation direction

  • Update to a Linux distribution kernel containing the referenced stable fix.
  • Prioritize affected systems that use USB media capture hardware or load pvrusb2.
  • Check your Linux vendor advisory for fixed package versions and backports.
  • Where unused, prevent pvrusb2 from loading only if vendor guidance permits.

Validation and detection

  • Inventory kernel versions across Linux assets.
  • Check whether the pvrusb2 module is present or loadable.
  • Confirm installed kernels include one of the referenced stable fixes or vendor backport.
  • Review vendor package changelogs for CVE-2022-49982 or the pvrusb2 fix.
Prepared
Confidence
medium
Sources
10

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-2022-49982 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
0ADP providers
9Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxb72b7bf5cbb2ae77b3bf748456655fc284baf04c, b72b7bf5cbb2ae77b3bf748456655fc284baf04c, b72b7bf5cbb2ae77b3bf748456655fc284baf04c, b72b7bf5cbb2ae77b3bf748456655fc284baf04c, b72b7bf5cbb2ae77b3bf748456655fc284baf04c, b72b7bf5cbb2ae77b3bf748456655fc284baf04c, b72b7bf5cbb2ae77b3bf748456655fc284baf04c, b72b7bf5cbb2ae77b3bf748456655fc284baf04cunaffected
LinuxLinux2.6.30, 0, 4.9.327, 4.14.292, 4.19.257, 5.4.212, 5.10.141, 5.15.65, 5.19.7, 6.0affected
Weakness

CWE details

No CWE listed

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