LiveActive security incident?Get immediate response
CVE Record

CVE-2022-49508: HID: elan: Fix potential double free in elan_input_configured

In the Linux kernel, the following vulnerability has been resolved: HID: elan: Fix potential double free in elan_input_configured 'input' is a managed resource allocated with devm_input_allocate_device(), so there is no need to call input_free_device() explicitly or there will be a double free. According to the doc of devm_input_allocate_device(): * Managed input devices do not need to be explicitly unregistered or * freed as it will be done automatically when owner device unbinds from * its driver (or binding fails).

HighCVSS 7.8Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This Linux kernel flaw is a double-free bug in the ELAN HID input driver path. A local, low-privileged user could potentially trigger memory corruption with high confidentiality, integrity, and availability impact. No provided source shows active exploitation.

Executive priority

Treat as high priority for Linux patch management, but not an emergency solely from the provided evidence. The risk is local privilege-based kernel impact, so prioritize exposed multi-user and endpoint fleets first.

Technical view

CVE-2022-49508 fixes an unnecessary input_free_device() call after devm_input_allocate_device() allocated a managed input device. The managed resource is automatically freed during driver unbind or binding failure, so explicit freeing can cause CWE-415 double free in elan_input_configured.

Likely exposure

Exposure is most likely on Linux systems running the affected kernel versions or commit lineage listed in the CVE, especially where the HID ELAN driver path is present. Distribution backports may change apparent version status, so validate against vendor kernel advisories and referenced stable commits.

Exploitation context

The CVSS vector is local, low complexity, low privileges, and no user interaction. The provided bundle marks KEV false and gives no evidence of exploitation in the wild, exploit tooling, or remote attack paths.

Researcher notes

The source evidence identifies the bug class, affected Linux kernel entries, CVSS 7.8, and stable kernel references. It does not provide proof-of-concept details, exploitation telemetry, indicators of compromise, or distro-specific fixed package versions.

Mitigation direction

  • Update to a distribution kernel containing the referenced upstream stable fix or vendor backport.
  • Prioritize shared workstations, developer endpoints, kiosks, and multi-user Linux systems.
  • Check Linux distribution advisories before assuming upstream version numbers map directly to exposure.
  • If immediate patching is blocked, reduce local user access on affected systems.

Validation and detection

  • Inventory Linux kernel versions across endpoints, servers, and appliances.
  • Confirm whether kernels include one of the referenced stable commits or an equivalent vendor backport.
  • Identify systems where HID ELAN driver support is enabled or relevant hardware is present.
  • Track remediation through normal vulnerability management evidence, including package version and reboot status.
Prepared
Confidence
medium
Sources
9

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.

cwe · low confidence lookup

CWE-415: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2022-49508 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
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

1CVSS vectors
3Timeline events
1ADP providers
8Source links

SSVC decision data

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

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2022-49508Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux9a6a4193d65b853020ef0e66cecdf9e64a863883, 9a6a4193d65b853020ef0e66cecdf9e64a863883, 9a6a4193d65b853020ef0e66cecdf9e64a863883, 9a6a4193d65b853020ef0e66cecdf9e64a863883, 9a6a4193d65b853020ef0e66cecdf9e64a863883, 9a6a4193d65b853020ef0e66cecdf9e64a863883, 9a6a4193d65b853020ef0e66cecdf9e64a863883unaffected
LinuxLinux4.17, 0, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19affected
Weakness

CWE details

CWE-415

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

CWE-415 · source CWE mapping

Double Free

Double Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs