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CVE Record

CVE-2024-46844: um: line: always fill *error_out in setup_one_line()

In the Linux kernel, the following vulnerability has been resolved: um: line: always fill *error_out in setup_one_line() The pointer isn't initialized by callers, but I have encountered cases where it's still printed; initialize it in all possible cases in setup_one_line().

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-46844 is a Linux kernel issue where an error pointer in User-Mode Linux line setup may be left uninitialized and later printed. The public record does not provide a CVSS score, impact rating, or evidence of exploitation, so urgency depends on whether affected kernels are present and vendor updates are available.

Executive priority

Treat this as a routine kernel hygiene item unless internal exposure analysis finds affected, high-value, multi-tenant, or unsupported Linux systems. There is not enough public evidence here to justify emergency action by itself.

Technical view

The fix ensures setup_one_line() always fills *error_out because callers did not initialize it, and observed paths could still print it. The CVE record lists Linux kernel versions as affected and references stable kernel commits plus Debian LTS advisories. No exploit mechanics, privilege requirement, or security impact class is provided.

Likely exposure

Exposure is limited to systems running affected Linux kernel builds listed in the CVE data, especially environments using User-Mode Linux functionality. The source bundle does not prove broad remote exposure or identify affected distributions beyond Debian LTS advisories.

Exploitation context

No cited source reports active exploitation, and the CVE is not marked in KEV. The available evidence describes a resolved kernel initialization flaw, but does not explain an attacker path, exploitability conditions, or whether impact is confidentiality, integrity, or availability.

Researcher notes

The useful research task is reachability analysis around the User-Mode Linux line setup path and any observable impact from printing an uninitialized error pointer. The bundle lacks CVSS, CWE, proof of concept, or exploit status, so conclusions should remain conservative.

Mitigation direction

  • Check vendor kernel advisories for CVE-2024-46844 coverage.
  • Apply supported kernel updates containing the referenced stable fixes.
  • For Debian LTS systems, review the listed Debian advisories.
  • Prioritize internet-facing or multi-tenant Linux hosts during routine patching.
  • Reboot systems after kernel updates where required by the vendor.

Validation and detection

  • Inventory Linux kernel versions across servers and appliances.
  • Compare running kernels with vendor-fixed packages or referenced stable commits.
  • Confirm Debian LTS hosts include the relevant DLA kernel updates.
  • Verify updated hosts boot the expected patched kernel.
  • Document exceptions where vendor guidance is unavailable.
Prepared
Confidence
medium
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.

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CVE-2024-46844 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
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
2ADP providers
11Source 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
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux31efcebb7d7196adcee73027f513d7c0bf572b47, 31efcebb7d7196adcee73027f513d7c0bf572b47, 31efcebb7d7196adcee73027f513d7c0bf572b47, 31efcebb7d7196adcee73027f513d7c0bf572b47, 31efcebb7d7196adcee73027f513d7c0bf572b47, 31efcebb7d7196adcee73027f513d7c0bf572b47, 31efcebb7d7196adcee73027f513d7c0bf572b47, 31efcebb7d7196adcee73027f513d7c0bf572b47unaffected
LinuxLinux3.4, 0, 4.19.322, 5.4.284, 5.10.226, 5.15.167, 6.1.110, 6.6.51, 6.10.10, 6.11affected
Weakness

CWE details

No CWE listed

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