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CVE Record

CVE-2024-50267: USB: serial: io_edgeport: fix use after free in debug printk

In the Linux kernel, the following vulnerability has been resolved: USB: serial: io_edgeport: fix use after free in debug printk The "dev_dbg(&urb->dev->dev, ..." which happens after usb_free_urb(urb) is a use after free of the "urb" pointer. Store the "dev" pointer at the start of the function to avoid this issue.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux USB serial driver can reference a freed memory object while writing a debug message. This kernel use-after-free may crash a system or potentially enable broader compromise. Exploitation requires local access and the affected io_edgeport code path, so exposure is narrower than an internet-reachable flaw.

Executive priority

Prioritize affected multi-user systems, endpoints permitting untrusted local access, and hosts using relevant USB serial devices. Remediate through normal high-severity kernel patching, accelerated for exposed local-user environments. Emergency internet-wide action is unsupported by the supplied evidence.

Technical view

CVE-2024-50267 is a CWE-416 use-after-free in Linux's io_edgeport USB serial driver. A debug call dereferences urb after usb_free_urb(urb). The upstream correction preserves the device pointer before freeing the URB. CVSS 3.1 is 7.8: local, low complexity, low privileges, no user interaction, with potentially high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is most likely on systems running an affected Linux kernel where the io_edgeport USB serial driver and vulnerable execution path are reachable. The supplied version data is ambiguous and should not be treated as a complete fixed-version matrix. Internet exposure alone does not make a host directly vulnerable because the CVSS attack vector is local.

Exploitation context

The supplied sources do not establish active exploitation, and the CVE is not identified as CISA KEV. Successful abuse is rated as requiring local access and low privileges. The sources establish the memory-safety defect and potential impact, but do not prove reliable privilege escalation or identify a public exploit.

Researcher notes

The flaw occurs specifically when a debug statement accesses urb->dev after the URB has been freed. The fix stores the device pointer before that free. Multiple stable-branch commits are supplied, but the bundle does not map each commit cleanly to exact vulnerable and fixed release ranges; confirm against distribution-maintained kernel metadata.

Mitigation direction

  • Apply a vendor-supported kernel containing the applicable stable fix.
  • Review Linux distribution advisories for corrected package versions.
  • Restrict untrusted local access while affected systems await updates.
  • Limit use of relevant USB serial hardware where operationally feasible.

Validation and detection

  • Inventory deployed kernel versions and distribution package revisions.
  • Determine whether the io_edgeport driver is present or used.
  • Compare vendor kernels against the referenced stable fixes and advisories.
  • After updating, confirm systems boot and USB serial functions operate normally.
Prepared
Confidence
high
Sources
12

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-416: 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.

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cve · low confidence lookup

CVE-2024-50267 mapping review

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

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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.

2CVSS vectors
3Timeline events
2ADP providers
11Source links

SSVC decision data

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

CVSS vector scores

2 official scores

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:H1.85.9Linux
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-2024-50267Attack 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
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux984f68683298ba53af32f909de1f9452fbb37ccb, 984f68683298ba53af32f909de1f9452fbb37ccb, 984f68683298ba53af32f909de1f9452fbb37ccb, 984f68683298ba53af32f909de1f9452fbb37ccb, 984f68683298ba53af32f909de1f9452fbb37ccb, 984f68683298ba53af32f909de1f9452fbb37ccb, 984f68683298ba53af32f909de1f9452fbb37ccb, 984f68683298ba53af32f909de1f9452fbb37ccbunaffected
LinuxLinux3.7, 0, 4.19.324, 5.4.286, 5.10.230, 5.15.172, 6.1.117, 6.6.61, 6.11.8, 6.12affected
Weakness

CWE details

CWE-416

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

CWE-416 · source CWE mapping

Use After Free

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

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